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Intel® Fortran Compiler

Developer Guide and Reference

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ID 767251

Date 3/31/2025

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Document Table of Contents

Document Table of Contents x

Developer Guide and Reference

Developer Guide and Reference x

Intel® Fortran Compiler Introduction Compiler Setup Compiler Reference Language Reference Compilation Program Structure Optimization and Programming Compatibility and Portability Notices and Disclaimers

Intel® Fortran Compiler Introduction x

Get Help and Support Related Information

Compiler Setup x

Use the Command Line Use Microsoft Visual Studio

Use the Command Line x

Specify Component Locations Invoke the Compiler Use the Command Line on Windows Run Fortran Applications from the Command Line File Extensions Use Makefiles for Compilation

Use Microsoft Visual Studio x

Use Microsoft Visual Studio* Solution Explorer Create a New Project Perform Common Tasks with Microsoft Visual Studio* Select a Version of the Intel® Fortran Compiler Use Visual Studio* IDE Automation Objects Specify Fortran File Extensions Understand Solutions, Projects, and Configurations Navigate Programmatic Components in a Fortran File Specify Path, Library, and Include Directories Set Compiler Options in the Microsoft Visual Studio* IDE Property Pages Supported Build Macros Use Manifests Use Intel® Libraries with Microsoft Visual Studio* Use Source Editor Enhancements in Microsoft Visual Studio* Create the Executable Program Convert and Copy Projects About Fortran Project Types Optimization Reports in Microsoft Visual Studio* Dialog Box Help

About Fortran Project Types x

Understand Project Types Specify Project Types with ifx Command Options Use Fortran Console Application Projects Use Fortran Standard Graphics Application Projects Use Fortran QuickWin Application Projects Use Fortran Windowing Application Projects Use Fortran Static Library Projects Use Fortran Dynamic-Link Library Projects Use the Console Create Fortran Applications That Use Windows Features

Dialog Box Help x

Options: General dialog box Options: Compilers dialog box Options: Advanced dialog box

Compiler Reference x

Compiler Limits Compiler Options Floating-Point Operations Libraries Data and I/O Mixed-Language Programming Error Handling

Compiler Options x

Alphabetical Option List General Rules for Compiler Options What Appears in the Compiler Option Descriptions Optimization Options Advanced Optimization Options Code Generation Options Offload Compilation, OpenMP*, and Parallel Processing Options Interprocedural Optimization Options Profile Guided Optimization Options Optimization Report Options Floating-Point Options Inlining Options Output, Debug, and Precompiled Header Options Preprocessor Options Component Control Options Language Options Data Options Compiler Diagnostic Options Compatibility Options Linking or Linker Options Miscellaneous Options Deprecated and Removed Compiler Options Display Option Information Alternate Compiler Options

Optimization Options x

falias, Oa fast foptimize-sibling-calls fprotect-parens, Qprotect-parens GF nolib-inline O Od Ofast Os Ot

Advanced Optimization Options x

ansi-alias, Qansi-alias coarray, Qcoarray coarray-config-file, Qcoarray-config-file coarray-num-images, Qcoarray-num-images fvec-allow-scalar-stores, Qvec-allow-scalar-stores fvec-non-loop-argument-load, Qvec-non-loop-argument-load fvec-peel-loops, Qvec-peel-loops fvec-remainder-loops, Qvec-remainder-loops fvec-with-mask, Qvec-with-mask heap-arrays mno-gather, Qgather- mno-scatter, Qscatter- pad, Qpad qmkl, Qmkl qmkl-ilp64, Qmkl-ilp64 qmkl-sycl-impl, Qmkl-sycl-impl qopt-dword-index-for-array-of-structs, Qopt-dword-index-for-array-of-structs qopt-dynamic-align, Qopt-dynamic-align qopt-for-throughput, Qopt-for-throughput qopt-matmul, Qopt-matmul qopt-mem-layout-trans, Qopt-mem-layout-trans qopt-multiple-gather-scatter-by-shuffles, Qopt-multiple-gather-scatter-by-shuffles qopt-prefetch, Qopt-prefetch qopt-prefetch-distance, Qopt-prefetch-distance qopt-prefetch-loads-only, Qopt-prefetch-loads-only qopt-streaming-stores, Qopt-streaming-stores qopt-zmm-usage, Qopt-zmm-usage qoverride-limits, Qoverride-limits reentrancy safe-cray-ptr, Qsafe-cray-ptr unroll, Qunroll vec, Qvec vec-threshold, Qvec-threshold vecabi, Qvecabi

Code Generation Options x

arch ax, Qax fasynchronous-unwind-tables fcf-protection, Qcf-protection fexceptions fomit-frame-pointer guard m, Qm m64, Qm64 m80387 march masm mauto-arch, Qauto-arch mbranches-within-32B-boundaries, Qbranches-within-32B-boundaries momit-leaf-frame-pointer mtune, tune x, Qx xHost, QxHost

Offload Compilation, OpenMP*, and Parallel Processing Options x

device-math-lib fiopenmp, Qiopenmp flink-huge-device-code fopenmp, Qopenmp fopenmp-concurrent-host-device-compile, Qopenmp-concurrent-host-device-compile fopenmp-declare-target-scalar-defaultmap, Qopenmp-declare-target-scalar-defaultmap fopenmp-default-allocator, Qopenmp-default-allocator fopenmp-device-code-split, Qopenmp-device-code-split fopenmp-device-lib fopenmp-do-concurrent-maptype-modifier, Qopenmp-do-concurrent-maptype-modifier fopenmp-max-parallel-link-jobs, Qopenmp-max-parallel-link-jobs fopenmp-offload-mandatory, Qopenmp-offload-mandatory fopenmp-target-buffers, Qopenmp-target-buffers fopenmp-target-default-sub-group-size, Qopenmp-target-default-sub-group-size fopenmp-target-do-concurrent, Qopenmp-target-do-concurrent fopenmp-target-loopopt, Qopenmp-target-loopopt fopenmp-target-simd, Qopenmp-target-simd fopenmp-targets, Qopenmp-targets fsycl fsycl-dead-args-optimization fsycl-device-code-split fsycl-device-lib fsycl-instrument-device-code fsycl-targets ftarget-compile-fast ftarget-register-alloc-mode, Qtarget-register-alloc-mode nolibsycl parallel, Qparallel qopenmp, Qopenmp qopenmp-link qopenmp-simd, Qopenmp-simd qopenmp-stubs, Qopenmp-stubs Xopenmp-target Xsycl-target

Interprocedural Optimization Options x

flto ipo, Qipo

Profile Guided Optimization Options x

finstrument-functions, Qinstrument-functions fprofile-ml-use

Optimization Report Options x

qopt-report, Qopt-report qopt-report-file, Qopt-report-file qopt-report-names, Qopt-report-names qopt-report-phase, Qopt-report-phase qopt-report-stdout, Qopt-report-stdout

Floating-Point Options x

ffp-accuracy, Qfp-accuracy fimf-absolute-error, Qimf-absolute-error fimf-accuracy-bits, Qimf-accuracy-bits fimf-arch-consistency, Qimf-arch-consistency fimf-domain-exclusion, Qimf-domain-exclusion fimf-max-error, Qimf-max-error fimf-precision, Qimf-precision fimf-use-svml, Qimf-use-svml fltconsistency fma, Qfma fp-model, fp fp-speculation, Qfp-speculation fpe fpe-all ftz, Qftz Ge pc, Qpc prec-div, Qprec-div recursive

Inlining Options x

finline finline-functions inline inline-forceinline, Qinline-forceinline inline-level, Ob

Output, Debug, and Precompiled Header Options x

c debug (Linux*) debug (Windows*) debug-parameters exe Fa FA fmerge-debug-strings ftrapuv, Qtrapuv fverbose-asm g gdwarf grecord-gcc-switches gsplit-dwarf list list-line-len list-page-len o object print-multi-lib S show Zi, Z7

Preprocessor Options x

B D d-lines, Qd-lines E EP fpp fpp-name gen-dep gen-depformat gen-depshow I idirafter isystem module preprocess-only u (Windows*) U undef X

Component Control Options x

Qinstall Qlocation Qoption

Language Options x

allow altparam assume ccdefault check extend-source fixed free fsanitize iface names pad-source, Qpad-source stand standard-realloc-lhs standard-semantics syntax-only wrap-margin

Data Options x

align auto auto-scalar, Qauto-scalar convert double-size dyncom, Qdyncom falign-functions, Qfnalign fmaintain-32-byte-stack-align, Qmaintain-32-byte-stack-align fmath-errno fpconstant fpic fpie fstack-protector fstack-security-check fstrict-overflow, Qstrict-overflow fvisibility fzero-initialized-in-bss, Qzero-initialized-in-bss Gs GS init, Qinit intconstant integer-size mcmodel real-size save, Qsave zero, Qzero

Compiler Diagnostic Options x

diag, Qdiag diag-dump, Qdiag-dump diag-error-limit, Qdiag-error-limit diag-file, Qdiag-file diag-file-append, Qdiag-file-append gen-interfaces traceback warn WB

Compatibility Options x

f66 f77rtl fpscomp gcc-name gxx-name vms

Linking or Linker Options x

4Nportlib, 4Yportlib Bdynamic Bstatic Bsymbolic Bsymbolic-functions cxxlib dbglibs dll dynamic-linker extlnk F (Windows*) fortlib fuse-ld l L libs link map MD MT nodefaultlibs nofor-main no-intel-lib, Qno-intel-lib nostartfiles nostdlib pie pthread shared shared-intel shared-libgcc static static-intel static-libgcc static-libstdc++ T threads v Wa winapp Wl Wp Xlinker

Miscellaneous Options x

dryrun dumpmachine extfor extfpp fpreview-breaking-changes global-hoist, Qglobal-hoist help intel-freestanding intel-freestanding-target-os libdir logo multiple-processes, MP save-temps, Qsave-temps sysroot Tf watch what

Floating-Point Operations x

Floating-Point Optimizations Subnormal Numbers Floating-Point Environment Set the FTZ and DAZ Flags Tuning Performance

Libraries x

Create Libraries Call Library Routines Comparison of Intel® Fortran Compiler and Windows API Routines Specify Consistent Library Types on Windows Redistribute Libraries When Deploying Applications Resolve References to Shared Libraries Redistributable Library Considerations Store Object Code in Static Libraries Store Routines in Shareable Libraries Use Windows API Routines Math Libraries

Use Windows API Routines x

Include the Intel® Fortran Interface Definitions for Windows API Routines Call Windows API Routines Supplied Windows API Modules

Data and I/O x

Data Representation Fortran I/O

Data Representation x

Integer Data Representations Logical Data Representations Character Representation Hollerith Representation

Integer Data Representations x

INTEGER(KIND=1) Representation INTEGER(KIND=2) Representation INTEGER(KIND=4) Representation INTEGER(KIND=8) Representation

Fortran I/O x

Logical Devices Physical Devices on Windows Types of I/O Statements Forms of I/O Statements Assign Files to Logical Units File Organization Internal Files and Scratch Files File Access and File Structure File Records Record Types Record Length Record Access Record Transfer Specify Default Pathnames and File Names Open Files: OPEN Statement Obtain File Information: INQUIRE Statement Close Files: CLOSE Statement Record I/O Statement Specifiers File Sharing on Linux Specify the Initial Record Position Advancing and Nonadvancing Record I/O Use USEROPEN to Pass Control To a Routine Microsoft Fortran PowerStation Compatible Files Use Asynchronous I/O

Mixed-Language Programming x

Standard Fortran and C Interoperability Use Standard Fortran Interoperability Syntax for Existing Fortran Extensions Standard Tools for Interoperability Platform Specifics Implementation Specifics Legacy Extensions

Standard Tools for Interoperability x

ISO_C_BINDING BIND(C) Interoperate with Arguments Using C Descriptors C Structures, Typedefs, and Macros for Interoperability Data Types Variables Global Data Procedures

Data Types x

Scalar Types Characters Pointers Derived Types

Platform Specifics x

Mixed-Language Issues Call Subprograms from the Main Program on Windows Pass Arguments in Mixed-Language Programming Stack Considerations in Calling Conventions on Windows Naming Conventions C/C++ Naming Conventions Compile and Link Intel® Fortran and C/C++ Programs Build Intel® Fortran and C Mixed-Language Programs on Windows

Implementation Specifics x

Fortran Module Naming Conventions Handle Fortran Array Pointers and Allocatable Arrays Handle Fortran Array Descriptors Return Character Data Types

Legacy Extensions x

ATTRIBUTES Directive Properties ALIAS Property for ATTRIBUTES Directive Use the -nofor-main Compiler Option

Error Handling x

Build Process Errors Runtime Errors

Runtime Errors x

Understand Runtime Errors Runtime Default Error Processing Runtime Message Display and Format Values Returned at Program Termination Methods of Handling Errors Locate Runtime Errors List of Runtime Error Messages Signal Handling on Linux* Override the Default Runtime Library Exception Handler Advanced Exception and Termination Handling

Advanced Exception and Termination Handling x

Default Exception Handling Default Console Event Handling Default Termination Handling Handlers for the Application Types Provide Your Own Exception or Termination Handler Use Windows* Structured Exception Handling Establish Console Event Handlers Use SIGNALQQ

Language Reference x

New Features Language Reference Conventions Program Elements and Source Forms Data Types, Constants, and Variables Expressions and Assignment Statements Specification Statements Dynamic Allocation Execution Control Program Units and Procedures Intrinsic Procedures Data Transfer I/O Statements I/O Formatting File Operation I/O Statements Compilation Control Lines and Statements Directive Enhanced Compilation Scope and Association Deleted and Obsolescent Language Features Additional Language Features Additional Character Sets Data Representation Models Library Modules and Runtime Library Routines Summary of Language Extensions A to Z Reference Glossary

Program Elements and Source Forms x

Program Units Statements Keywords Names Character Sets Source Forms

Source Forms x

Free Source Form Fixed and Tab Source Forms Source Code Useable for All Source Forms

Fixed and Tab Source Forms x

Fixed-Format Lines Tab-Format Lines

Data Types, Constants, and Variables x

Intrinsic Data Types Derived Data Types Binary, Octal, Hexadecimal, and Hollerith Constants Enumerations and Enumerators Variables

Intrinsic Data Types x

Integer Data Types Real Data Types Complex Data Types Logical Data Types Character Data Type

Integer Data Types x

Integer Constants

Real Data Types x

General Rules for Real Constants REAL(4) Constants REAL(8) or DOUBLE PRECISION Constants REAL(16) Constants

Complex Data Types x

General Rules for Complex Constants COMPLEX(4) Constants COMPLEX(8) or DOUBLE COMPLEX Constants COMPLEX(16) Constants

Logical Data Types x

Logical Constants

Character Data Type x

Character Constants C Strings in Character Constants Character Substrings

Derived Data Types x

Default Initialization Procedure Pointers as Derived-Type Components Type-Bound Procedures Type Extension Parameterized Derived-Type Declarations Structure Components Structure Constructors

Parameterized Derived-Type Declarations x

Parameterized TYPE Statements

Parameterized TYPE Statements x

Structure Constructors for Parameterized Derived Types Type Parameter Order for Parameterized Derived Types Deferred-Length Type Parameters for Parameterized Derived Types Assumed-Length Type Parameters for Parameterized Derived Types

Binary, Octal, Hexadecimal, and Hollerith Constants x

Binary Constants Octal Constants Hexadecimal Constants Hollerith Constants Determine the Data Type of Nondecimal Constants

Variables x

Data Types of Scalar Variables Arrays Coarrays Variable-Definition Context

Data Types of Scalar Variables x

Specification of Data Type Implicit Typing Rules

Arrays x

Whole Arrays Array Elements Array Sections Array Constructors

Array Sections x

Subscript Triplets Vector Subscripts

Coarrays x

Image Selectors Established Coarrays Deferred-Coshape Coarrays Explicit-Coshape Coarrays Reference Coarray Images Specify Data Objects for Coarray Images

Expressions and Assignment Statements x

Expressions Assignments

Expressions x

Numeric Expressions Character Expressions Relational Expressions Logical Expressions Defined Operations Summary of Operator Precedence Constant and Specification Expressions

Numeric Expressions x

Parentheses in Numeric Expressions Data Type of Numeric Expressions

Constant and Specification Expressions x

Constant Expressions Specification Expressions

Assignments x

Intrinsic Assignment Statements Defined Assignment Statements Pointer Assignments

Intrinsic Assignment Statements x

Numeric Assignment Statements Logical Assignment Statements Character Assignment Statements Derived-Type Assignment Statements Array Assignment Statements Examples of Intrinsic Assignment to Polymorphic Variables

Specification Statements x

Type Declarations Effects of Equivalency and Interaction with COMMON Statements

Type Declarations x

Declarations for Noncharacter Types Declarations for Character Types Declarations for Derived Types Declarations for Other Nonintrinsic Types Declarations for Arrays

Declarations for Arrays x

Explicit-Shape Specifications Assumed-Shape Specifications Assumed-Size Specifications Assumed-Rank Specifications Deferred-Shape Specifications Implied-Shape Specifications

Effects of Equivalency and Interaction with COMMON Statements x

Make Arrays Equivalent Make Substrings Equivalent EQUIVALENCE and COMMON Interaction

Dynamic Allocation x

Effects of Allocation Effects of Deallocation

Effects of Allocation x

Allocation of Allocatable Variables Allocation of Allocatable Arrays Allocation of Pointer Targets

Effects of Deallocation x

Deallocation of Allocatable Variables Deallocation of Allocatable Arrays Deallocation of Pointer Targets

Execution Control x

Program Termination Branch Statements Overview Effects of DO Constructs Image Control Statements

Effects of DO Constructs x

Iteration Loop Control Nested DO Constructs Extended Range

Image Control Statements x

STAT= and ERRMSG= Specifiers in Image Control Statements Execution Segments for Images

Program Units and Procedures x

Main Program Procedure Characteristics Modules and Module Procedures Intrinsic Modules Block Data Program Units Overview Functions, Subroutines, and Statement Functions External Procedures Internal Procedures Argument Association in Procedures Procedure Interfaces Interoperability of Procedures and Procedure Interfaces Procedure Pointers

Modules and Module Procedures x

Separate Module Procedures

Intrinsic Modules x

ISO_C_BINDING Module ISO_FORTRAN_ENV Module IEEE Intrinsic Modules and Procedures

ISO_C_BINDING Module x

Named Constants in the ISO_C_BINDING Module Intrinsic Module Procedures - ISO_C_BINDING

ISO_FORTRAN_ENV Module x

Named Constants in the ISO_FORTRAN_ENV Module Derived Types in the ISO_FORTRAN_ENV Module Intrinsic Module Procedures - ISO_FORTRAN_ENV

IEEE Intrinsic Modules and Procedures x

IEEE_ARITHMETIC Intrinsic Module IEEE_EXCEPTIONS Intrinsic Module IEEE_FEATURES Intrinsic Module IEEE Intrinsic Modules Quick Reference Tables

Functions, Subroutines, and Statement Functions x

General Rules for Function and Subroutine Subprograms Functions Overview Subroutines Overview Statement Functions Overview Entry Points in Subprograms

General Rules for Function and Subroutine Subprograms x

Recursive Procedures Pure Procedures Impure Procedures Elemental Procedures

Functions Overview x

RESULT Keyword Overview Function References

Entry Points in Subprograms x

Entry Points in Function Subprograms Entry Points in Subroutine Subprograms

Argument Association in Procedures x

Optional Arguments Array Arguments Pointer Arguments Passed-Object Dummy Arguments Assumed-Length Character Arguments Character Constant and Hollerith Arguments Alternate Return Arguments Dummy Procedure Arguments Coarray Dummy Arguments References to Generic Procedures References to Non-Fortran Procedures

References to Generic Procedures x

References to Generic Intrinsic Functions References to Elemental Intrinsic Procedures

Procedure Interfaces x

Procedures that Require Explicit Interfaces Explicit and Abstract Interfaces Define Generic Names for Procedures Define Generic Operators Define Generic Assignment

Intrinsic Procedures x

Argument Keywords in Intrinsic Procedures Overview of Atomic Subroutines Overview of Collective Subroutines Overview of Bit Functions Categories and Lists of Intrinsic Procedures

Categories and Lists of Intrinsic Procedures x

Categories of Intrinsic Functions Intrinsic Subroutines

Data Transfer I/O Statements x

Records and Files Components of Data Transfer Statements Forms for READ Statements Forms for WRITE Statements User-Defined Derived-Type I/O

Components of Data Transfer Statements x

I/O Control List I/O Lists

I/O Control List x

Advance Specifier (ADVANCE=) Asynchronous Specifier (ASYNCHRONOUS=) Blank Specifier (BLANK=) Branch Specifiers (END=, EOR=, ERR=) Character Count Specifier (SIZE=) Decimal Specifier (DECIMAL=) Delimiter Specifier (DELIM=) Format Specifier (FMT=) Identification Specifier (ID=) I/O Message Specifier (IOMSG=) I/O Status Specifier (IOSTAT=) Namelist Specifier (NML=) Padding Specifier (PAD=) Position Specifier (POS=) Record Specifier (REC=) Rounding Specifier (ROUND=) Sign Specifier (SIGN=) Unit Specifier (UNIT=)

I/O Lists x

Simple List Items in I/O Lists Implied-DO Lists in I/O Lists

Forms for READ Statements x

Forms for Sequential READ Statements Forms for Direct-Access READ Statements Forms for Stream READ Statements Forms and Rules for Internal READ Statements

Forms for Sequential READ Statements x

Rules for Formatted Sequential READ Statements Rules for List-Directed Sequential READ Statements Rules for Namelist Sequential READ Statements Rules for Unformatted Sequential READ Statements

Forms for Direct-Access READ Statements x

Rules for Formatted Direct-Access READ Statements Rules for Unformatted Direct-Access READ Statements

Forms for WRITE Statements x

Forms for Sequential WRITE Statements Forms for Direct-Access WRITE Statements Forms for Stream WRITE Statements Forms and Rules for Internal WRITE Statements

Forms for Sequential WRITE Statements x

Rules for Formatted Sequential WRITE Statements Rules for List-Directed Sequential WRITE Statements Rules for Namelist Sequential WRITE Statements Rules for Unformatted Sequential WRITE Statements

Forms for Direct-Access WRITE Statements x

Rules for Formatted Direct-Access WRITE Statements Rules for Unformatted Direct-Access WRITE Statements

User-Defined Derived-Type I/O x

Specify the User-Defined Derived Type Examples of User-Defined Derived-Type I/O

Specify the User-Defined Derived Type x

DT Edit Descriptor in User-Defined I/O Associate a Procedure with Defined I/O Characteristics of Defined I/O Procedures Defined I/O Data Transfers Distinguish Between Defined I/O Procedure References Recursive Defined I/O

Associate a Procedure with Defined I/O x

Defined I/O Procedures Generic Bindings Generic Interface Block

I/O Formatting x

Format Specifications Data Edit Descriptors Control Edit Descriptors Character String Edit Descriptors Nested and Group Repeat Specifications Variable Format Expressions Print Formatted Records Interaction Between Format Specifications and I/O Lists

Data Edit Descriptors x

Forms for Data Edit Descriptors General Rules for Numeric Editing Integer Editing Real and Complex Editing Logical Editing (L) Character Editing (A and AT) Defined I/O Editing (DT) Default Widths for Data Edit Descriptors Terminating Short Fields of Input Data

Integer Editing x

I Editing B Editing O Editing Z Editing

Real and Complex Editing x

F Editing E and D Editing EN Editing ES Editing EX Editing G Editing Complex Editing

Control Edit Descriptors x

Forms for Control Edit Descriptors Positional Editing Sign Editing Blank Editing Round Editing Decimal Editing Scale-Factor Editing (P) Slash Editing ( / ) Colon Editing (:) Dollar-Sign ($) and Backslash ( \ ) Editing Character Count Editing (Q)

Positional Editing x

T Editing TL Editing TR Editing X Editing

Sign Editing x

SP Editing SS Editing S Editing

Blank Editing x

BN Editing BZ Editing

Round Editing x

RU Editing RD Editing RZ Editing RN Editing RC Editing RP Editing

Decimal Editing x

DC Editing DP Editing

Character String Edit Descriptors x

Character Constant Editing H Editing

File Operation I/O Statements x

INQUIRE Statement Specifiers OPEN Statement Specifiers

INQUIRE Statement Specifiers x

INQUIRE: ACCESS Specifier INQUIRE: ACTION Specifier INQUIRE: ASYNCHRONOUS Specifier INQUIRE: BINARY Specifier INQUIRE: BLANK Specifier INQUIRE: BLOCKSIZE Specifier INQUIRE: BUFFERED Specifier INQUIRE: CARRIAGECONTROL Specifier INQUIRE: CONVERT Specifier INQUIRE: DECIMAL Specifier INQUIRE: DELIM Specifier INQUIRE: DIRECT Specifier INQUIRE: ENCODING Specifier INQUIRE: EXIST Specifier INQUIRE: FORM Specifier INQUIRE: FORMATTED Specifier INQUIRE: ID Specifier INQUIRE: IOFOCUS Specifier INQUIRE: IOLENGTH Specifier INQUIRE: IOMSG Specifier INQUIRE: IOSTAT Specifier INQUIRE: MODE Specifier INQUIRE: NAME Specifier INQUIRE: NAMED Specifier INQUIRE: NEXTREC Specifier INQUIRE: NUMBER Specifier INQUIRE: OPENED Specifier INQUIRE: ORGANIZATION Specifier INQUIRE: PAD Specifier INQUIRE: PENDING Specifier INQUIRE: POS Specifier INQUIRE: POSITION Specifier INQUIRE: READ Specifier INQUIRE: READWRITE Specifier INQUIRE: RECL Specifier INQUIRE: RECORDTYPE Specifier INQUIRE: ROUND Specifier INQUIRE: SEQUENTIAL Specifier INQUIRE: SHARE Specifier INQUIRE: SIGN Specifier INQUIRE: SIZE Specifier INQUIRE: STREAM Specifier INQUIRE: UNFORMATTED Specifier INQUIRE: WRITE Specifier

OPEN Statement Specifiers x

OPEN: ACCESS Specifier OPEN: ACTION Specifier OPEN: ASSOCIATEVARIABLE Specifier OPEN: ASYNCHRONOUS Specifier OPEN: BLANK Specifier OPEN: BLOCKSIZE Specifier OPEN: BUFFERCOUNT Specifier OPEN: BUFFERED Specifier OPEN: CARRIAGECONTROL Specifier OPEN: CONVERT Specifier OPEN: DECIMAL Specifier OPEN: DEFAULTFILE Specifier OPEN: DELIM Specifier OPEN: DISPOSE Specifier OPEN: ENCODING Specifier OPEN: FILE Specifier OPEN: FORM Specifier OPEN: IOFOCUS Specifier OPEN: MAXREC Specifier OPEN: MODE Specifier OPEN: NAME Specifier OPEN: NEWUNIT Specifier OPEN: NOSHARED Specifier OPEN: ORGANIZATION Specifier OPEN: PAD Specifier OPEN: POSITION Specifier OPEN: READONLY Specifier OPEN: RECL Specifier OPEN: RECORDSIZE Specifier OPEN: RECORDTYPE Specifier OPEN: ROUND Specifier OPEN: SHARE Specifier OPEN: SHARED Specifier OPEN: SIGN Specifier OPEN: STATUS Specifier OPEN: TITLE Specifier OPEN: TYPE Specifier OPEN: USEROPEN Specifier

Directive Enhanced Compilation x

Syntax Rules for Compiler Directives General Compiler Directives OpenMP* Fortran Compiler Directives Equivalent Compiler Options

General Compiler Directives x

Rules for Placement of Directives Rules for General Directives that Affect DO Loops Rules for Loop Directives that Affect Array Assignment Statements

OpenMP* Fortran Compiler Directives x

Categories for OpenMP* Fortran Directives Clauses Used in Multiple OpenMP* Fortran Directives Conditional Compilation Rules Rules for Nesting and Binding

Scope and Association x

Scope Unambiguous Generic Procedure References Resolve Procedure References Association

Resolve Procedure References x

References to Generic Names References to Specific Names References to Non-Established Names

Association x

Name Association Pointer Association Storage Association Inheritance Association

Name Association x

Argument Association Use and Host Association Linkage Association Construct Association

Use and Host Association x

Use Association Host Association

Construct Association x

Additional Attributes of Associate Names

Storage Association x

Storage Units and Storage Sequence Array Association

Deleted and Obsolescent Language Features x

Deleted Language Features in the Fortran Standard Obsolescent Language Features in the Fortran Standard

Additional Language Features x

FORTRAN 66 Interpretation of the EXTERNAL Statement Alternative Syntax for the PARAMETER Statement Alternative Syntax for Binary, Octal, and Hexadecimal Constants Alternative Syntax for a Record Specifier Alternative Syntax for the DELETE Statement Alternative Form for Namelist External Records Record Structures

Record Structures x

Structure Declarations References to Record Fields Aggregate Assignment

Structure Declarations x

Type Declarations within Record Structures Substructure Declarations

Additional Character Sets x

Character and Key Code Charts for Windows* ASCII Character Set for Linux*

Character and Key Code Charts for Windows* x

ASCII Character Codes for Windows* ANSI Character Codes for Windows* Key Codes for Windows*

ASCII Character Codes for Windows* x

ASCII Character Codes Chart 1 (Windows) ASCII Character Codes Chart 2: IBM* Character Set (Windows)

ANSI Character Codes for Windows* x

ANSI Character Codes Chart (Windows)

Key Codes for Windows* x

Key Codes Chart 1 (Windows) Key Codes Chart 2 (Windows)

Data Representation Models x

Model for Integer Data Model for Real Data Model for Bit Data

Model for Bit Data x

Bit Sequence Comparisons

Library Modules and Runtime Library Routines x

Runtime Library Routines

Runtime Library Routines x

NLS and MCBS Routines on Windows Standard Fortran Routines that Handle MBCS Characters on Windows Portability Routines Serial Port I/O Routines on Windows

Summary of Language Extensions x

Language Extensions: Source Forms Language Extensions: Names Language Extensions: Character Sets Language Extensions: Intrinsic Data Types Language Extensions: Constants Language Extensions: Expressions and Assignment Language Extensions: Specification Statements Language Extensions: Execution Control Language Extensions: Compilation Control Lines and Statements Language Extensions: Built-In Functions Language Extensions: I/O Statements Language Extensions: I/O Formatting Language Extensions: File Operation Statements Language Extensions: Compiler Directives Language Extensions: Intrinsic Procedures Language Extensions: Additional Language Features Language Extensions: Runtime Library Routines

A to Z Reference x

Language Summary Tables A to B C to D E to F G H to I J to L M to N O to P Q to R S T to Z POSIX* Library Routines Automation Server and Component Object Model Library Routines National Language Support Library Routines QuickWin Library Routines Graphics Library Routines Serial Port I/O Library Routines Dialog Library Routines

Language Summary Tables x

Statements for Program Unit Calls and Definitions Statements Affecting Variables Statements and Intrinsic Functions for Input and Output Compiler Directives Program Control Statements Inquiry Intrinsic Functions Random Number Intrinsic Procedures Atomic Intrinsic Subroutines Collective Intrinsic Subroutines Date and Time Intrinsic Subroutines Keyboard and Speaker Library Routines Statements and Intrinsic Procedures for Memory Allocation and Deallocation Intrinsic Functions for Arrays and Coarrays Intrinsic Functions for Numeric and Type Conversion Trigonometric, Bessel, Exponential, Root, and Logarithmic Intrinsic Procedures Intrinsic Functions for Floating-Point Inquiry and Control Character Intrinsic Functions Intrinsic Procedures for Bit Operation and Representation QuickWin Library Routines Summary Graphics Library Routines Summary Portability Library Routines National Language Support Library Routines Summary POSIX* Library Procedures Summary Dialog Library Routines Summary COM and Automation Library Routines Miscellaneous Runtime Library Routines

A to B x

ABORT ABS ABSTRACT INTERFACE ACCEPT ACCESS Function ACHAR ACOS ACOSD ACOSH ADJUSTL ADJUSTR AIMAG AINT ALARM ALIAS Directive ALIGNED Clause ALL ALLOCATABLE ALLOCATE Clause ALLOCATE Directive ALLOCATE Statement ALLOCATED ALLOCATORS AND ANINT ANY ASIN ASIND ASINH ASSIGN - Label Assignment Assignment(=) - Defined Assignment Assignment - Intrinsic Computational ASSOCIATE ASSOCIATED ASSUME ASSUME_ALIGNED ASSUMES Directive for OpenMP ASSUMPTION Clause ASYNCHRONOUS ATAN ATAN2 ATAN2D ATAND ATANH ATOMIC ATOMIC_ADD ATOMIC_AND ATOMIC_CAS ATOMIC_DEFINE ATOMIC_FETCH_ADD ATOMIC_FETCH_AND ATOMIC_FETCH_OR ATOMIC_FETCH_XOR ATOMIC_OR ATOMIC_REF ATOMIC_XOR ATTRIBUTES AUTOMATIC BACKSPACE BADDRESS BARRIER BEEPQQ BESJ0, BESJ1, BESJN, BESY0, BESY1, BESYN BESSEL_J0 BESSEL_J1 BESSEL_JN BESSEL_Y0 BESSEL_Y1 BESSEL_YN BGE BGT BIC, BIS BIND BIT BIT_SIZE BLE BLOCK BLOCK DATA BLOCK_LOOP and NOBLOCK_LOOP BLT BSEARCHQQ BTEST BYTE

ATTRIBUTES x

ATTRIBUTES ALIAS ATTRIBUTES ALIGN ATTRIBUTES ALLOCATABLE ATTRIBUTES ALLOW_NULL ATTRIBUTES C and STDCALL ATTRIBUTES CODE_ALIGN ATTRIBUTES CONCURRENCY_SAFE ATTRIBUTES CVF ATTRIBUTES DECORATE ATTRIBUTES DEFAULT ATTRIBUTES DLLEXPORT and DLLIMPORT ATTRIBUTES EXTERN ATTRIBUTES INLINE, NOINLINE, and FORCEINLINE ATTRIBUTES IGNORE_LOC ATTRIBUTES MIXED_STR_LEN_ARG and NOMIXED_STR_LEN_ARG ATTRIBUTES NO_ARG_CHECK ATTRIBUTES NOCLONE ATTRIBUTES REFERENCE and VALUE ATTRIBUTES VARYING ATTRIBUTES VECTOR

C to D x

C_ASSOCIATED C_F_POINTER C_F_PROCPOINTER C_F_STRPOINTER C_FUNLOC C_LOC C_SIZEOF CACHESIZE CALL CANCEL CANCELLATION POINT CASE CDFLOAT CEILING CFI_address CFI_allocate CFI_deallocate CFI_establish CFI_is_contiguous CFI_section CFI_select_part CFI_setpointer CHANGEDIRQQ CHANGEDRIVEQQ CHANGE TEAM and END TEAM CHAR CHARACTER CHDIR CHMOD CLASS CLEARSTATUSFPQQ CLOCK CLOCKX CLOSE CMPLX CO_BROADCAST CO_MAX CO_MIN CO_REDUCE CO_SUM CODE_ALIGN CODIMENSION COLLAPSE Clause COMMAND_ARGUMENT_COUNT COMMITQQ COMMON COMPILER_OPTIONS COMPILER_VERSION COMPLEX Statement COMPLINT, COMPLREAL, COMPLLOG CONJG CONTAINS CONTIGUOUS CONTINUE COPYIN Clause COPYPRIVATE Clause COS COSD COSH COSHAPE COTAN COTAND COUNT CPU_TIME CRITICAL Directive CRITICAL Statement CSHIFT CSMG CTIME CYCLE DATA DATE Intrinsic Procedure DATE Portability Routine DATE4 DATE_AND_TIME DBESJ0, DBESJ1, DBESJN, DBESY0, DBESY1, DBESYN DBLE DCLOCK DCMPLX DEALLOCATE DECLARE and NODECLARE DECLARE MAPPER DECLARE REDUCTION DECLARE SIMD DECLARE TARGET DECLARE VARIANT DECODE DEFAULT Clause DEFINE and UNDEFINE DEFINE FILE DELDIRQQ DELETE DELFILESQQ DEPEND Clause DEPOBJ DEVICE Clause DEVICE_TYPE Clause DFLOAT DFLOATI, DFLOATJ, DFLOATK DIGITS DIM Results Example See Also DIMENSION DISPATCH DISTRIBUTE DISTRIBUTE PARALLEL DO DISTRIBUTE PARALLEL DO SIMD DISTRIBUTE POINT DISTRIBUTE SIMD DNUM DO Directive DO Statement DO CONCURRENT DO SIMD DO WHILE DOT_PRODUCT DOUBLE COMPLEX DOUBLE PRECISION DPROD DRAND, DRANDM DRANSET DREAL DSHIFTL DSHIFTR DTIME

E to F x

ELEMENTAL ELSE Directive ELSE Statement ELSEIF Directive ELSE IF ELSE WHERE ENCODE END END DO ENDIF Directive END IF ENDFILE END FORALL END INTERFACE END TYPE END WHERE ENTRY EOF EOSHIFT EPSILON EQUIVALENCE ERF ERFC ERFC_SCALED ERROR Directive for OpenMP ERRSNS ESTABLISHQQ ETIME EVENT POST and EVENT WAIT EVENT_QUERY EXECUTE_COMMAND_LINE EXIT Statement EXIT Subroutine EXP EXP10 EXPONENT EXTENDS_TYPE_OF EXTERNAL F_C_STRING FAIL IMAGE FAILED_IMAGES FDATE FGETC FINAL Clause FINAL Statement FIND FINDLOC FINDFILEQQ FIRSTPRIVATE FIXEDFORMLINESIZE FLOAT FLOOR FLUSH Directive FLUSH Statement FLUSH Subroutine FMA and NOFMA FOR_DESCRIPTOR_ASSIGN FOR_GET_FPE FOR_IFCORE_VERSION FOR_IFPORT_VERSION FOR_LFENCE FOR_MFENCE for_rtl_finish_ for_rtl_init_ FOR_SET_FPE FOR_SET_FTN_ALLOC FOR_SET_REENTRANCY FOR_SFENCE FORALL FORMAT FORM TEAM FP_CLASS FPUTC FRACTION FREE FREEFORM and NOFREEFORM FSEEK FSTAT FTELL, FTELLI8 FULLPATHQQ FUNCTION

G x

GAMMA GENERIC GERROR GETARG GETC GETCHARQQ GET_COMMAND GET_COMMAND_ARGUMENT GETCONTROLFPQQ GETCWD GETDAT GETDRIVEDIRQQ GETDRIVESIZEQQ GETDRIVESQQ GETENV GET_ENVIRONMENT_VARIABLE GETENVQQ GETEXCEPTIONPTRSQQ GETFILEINFOQQ GETGID GETLASTERROR GETLASTERRORQQ GETLOG GETPID GETPOS, GETPOSI8 GETSTATUSFPQQ GETSTRQQ GET_TEAM GETTIM GETTIMEOFDAY GETUID GMTIME GOTO - Assigned GOTO - Computed GOTO - Unconditional GROUPPRIVATE

H to I x

HINT HOSTNAM HUGE HYPOT IACHAR IALL IAND IANY IARGC IBCHNG IBCLR IBITS IBSET ICHAR IDATE Intrinsic Procedure IDATE Portability Routine IDATE4 IDENT IDFLOAT IEEE_CLASS IEEE_COPY_SIGN IEEE_FLAGS IEEE_FMA IEEE_GET_FLAG IEEE_GET_HALTING_MODE IEEE_GET_MODES IEEE_GET_ROUNDING_MODE IEEE_GET_STATUS IEEE_GET_UNDERFLOW_MODE IEEE_HANDLER IEEE_INT IEEE_IS_FINITE IEEE_IS_NAN IEEE_IS_NEGATIVE IEEE_IS_NORMAL IEEE_LOGB IEEE_MAX IEEE_MAX_MAG IEEE_MAX_NUM IEEE_MAX_NUM_MAG IEEE_MIN IEEE_MIN_MAG IEEE_MIN_NUM IEEE_MIN_NUM_MAG IEEE_NEXT_AFTER IEEE_NEXT_DOWN IEEE_NEXT_UP IEEE_QUIET_EQ IEEE_QUIET_GE IEEE_QUIET_GT IEEE_QUIET_LE IEEE_QUIET_LT IEEE_QUIET_NE IEEE_REAL IEEE_REM IEEE_RINT IEEE_SCALB IEEE_SELECTED_REAL_KIND IEEE_SET_FLAG IEEE_SET_HALTING_MODE IEEE_SET_MODES IEEE_SET_ROUNDING_MODE IEEE_SET_STATUS IEEE_SET_UNDERFLOW_MODE IEEE_SIGNALING_EQ IEEE_SIGNALING_GE IEEE_SIGNALING_GT IEEE_SIGNALING_LE IEEE_SIGNALING_LT IEEE_SIGNALING_NE IEEE_SIGNBIT IEEE_SUPPORT_DATATYPE IEEE_SUPPORT_DENORMAL IEEE_SUPPORT_DIVIDE IEEE_SUPPORT_FLAG IEEE_SUPPORT_HALTING IEEE_SUPPORT_INF IEEE_SUPPORT_IO IEEE_SUPPORT_NAN IEEE_SUPPORT_ROUNDING IEEE_SUPPORT_SQRT IEEE_SUPPORT_STANDARD IEEE_SUPPORT_SUBNORMAL IEEE_SUPPORT_UNDERFLOW_CONTROL IEEE_UNORDERED IEEE_VALUE IEOR IERRNO IF - Arithmetic IF - Logical IF Clause IF Construct IF Directive Construct IF DEFINED Directive IFIX IFLOATI, IFLOATJ ILEN IMAGE_INDEX IMAGE_STATUS IMPLICIT IMPORT IMPURE IN_REDUCTION INCLUDE INDEX INLINE, FORCEINLINE, and NOINLINE INMAX INQUIRE INT INTC INT_PTR_KIND INTEGER Statement INTEGER Directive INTERCHANGE Directive for OpenMP INTENT INTERFACE INTERFACE TO INTEROP INTRINSIC INUM IOR IPARITY IRAND, IRANDM IRANGET IRANSET IS_CONTIGUOUS IS_DEVICE_PTR Clause IS_IOSTAT_END IS_IOSTAT_EOR ISATTY ISHA ISHC ISHFT ISHFTC ISHL ISNAN ITERATOR Clause Modifier ITIME IVDEP IXOR

J to L x

JABS JDATE JDATE4 JNUM KILL KIND KNUM LASTPRIVATE LBOUND LCOBOUND LCWRQQ LEADZ LEN LEN_TRIM LGE LGT LINEAR Clause LLE LLT LNBLNK LOC %LOC LOCK and UNLOCK LOG LOG_GAMMA LOG10 LOGICAL Function LOGICAL Statement LONG LOOP LOOP COUNT LSHIFT LSTAT LTIME

M to N x

MAKEDIRQQ MALLOC MAP Clause MAP and END MAP MASKED MASKED TASKLOOP MASKED TASKLOOP SIMD MASKL MASKR MASTER MASTER TASKLOOP MASTER TASKLOOP SIMD MATMUL MAX MAXEXPONENT MAXLOC MAXVAL MCLOCK MERGE MERGE_BITS MERGEABLE Clause MESSAGE METADIRECTIVE MIN MINEXPONENT MINLOC MINVAL MM_PREFETCH MOD MODULE MODULE FUNCTION MODULE PROCEDURE MODULE SUBROUTINE MODULO MOVE_ALLOC MVBITS NAMELIST NARGS NEAREST NEW_LINE NINT NOFREEFORM NOFUSION NON_RECURSIVE NOOPTIMIZE NOPREFETCH NORM2 NOSTRICT NOT NOTHING NOUNROLL NOUNROLL_AND_JAM NOVECTOR NOWAIT Clause NULL NULLIFY NUM_IMAGES

O to P x

OBJCOMMENT OPEN OPTIONAL OPTIMIZE and NOOPTIMIZE OPTIONS Directive OPTIONS Statement OR ORDER Clause ORDERED OUT_OF_RANGE PACK Directive PACK Function PACKTIMEQQ PARALLEL Directive for OpenMP PARALLEL DO PARALLEL DO SIMD PARALLEL LOOP PARALLEL MASKED PARALLEL MASKED TASKLOOP PARALLEL MASKED TASKLOOP SIMD PARALLEL MASTER PARALLEL MASTER TASKLOOP PARALLEL MASTER TASKLOOP SIMD PARALLEL SECTIONS PARALLEL WORKSHARE PARAMETER PARITY PAUSE PEEKCHARQQ PERROR POINTER - Fortran POINTER - Integer POPCNT POPPAR PRECISION PREFETCH and NOPREFETCH General Directives PREFETCH DATA Directive for OpenMP PRESENT PRINT PRIORITY PRIVATE Clause PRIVATE Statement PROCEDURE PROCESSOR Clause PRODUCT PROGRAM PROTECTED PSECT PUBLIC PURE PUTC

Q to R x

QCMPLX QEXT QFLOAT QNUM QRANSET QREAL QSORT RADIX RAISEQQ RAN RAND, RANDOM RANDOM Subroutine RANDOM_INIT RANDOM_NUMBER RANDOM_SEED RANDU RANF Intrinsic Procedure RANF Portability Routine RANGE RANGET RANK RANSET READ Statement REAL Directive REAL Function REAL Statement RECORD RECURSIVE and NON_RECURSIVE REDUCE REDUCTION %REF RENAME RENAMEFILEQQ REPEAT REQUIRES RESHAPE RESULT RETURN REWIND REWRITE RINDEX RNUM RRSPACING RSHIFT RTC RUNQQ

S x

SAME_TYPE_AS SAVE SCALE SCAN Directive SCAN Function SCANENV SCOPE SCWRQQ SECNDS Intrinsic Procedure SECNDS Portability Routine SECTIONS SEED SELECT CASE and END SELECT SELECT RANK SELECT TYPE SELECTED_CHAR_KIND SELECTED_INT_KIND SELECTED_REAL_KIND SEQUENCE SETCONTROLFPQQ SETDAT SETENVQQ SETERRORMODEQQ SET_EXPONENT SETFILEACCESSQQ SETFILETIMEQQ SETTIM SHAPE SHARED Clause SHIFTA SHIFTL SHIFTR SHORT SIGN SIGNAL SIGNALQQ SIMD Directive for OpenMP SIN SIND SINGLE SINH SIZE Function SIZEOF SLEEP SLEEPQQ SNGL SORTQQ SPACING SPLIT SPLITPATHQQ SPREAD SQRT SRAND SSWRQQ STAT Statement Function STATIC STOP and ERROR STOP STOPPED_IMAGES STORAGE_SIZE STRICT and NOSTRICT STRUCTURE and END STRUCTURE SUBDEVICE SUBMODULE SUBROUTINE SUM SYNC ALL SYNC IMAGES SYNC MEMORY SYNC TEAM SYSTEM SYSTEM_CLOCK SYSTEMQQ

T to Z x

TAN TAND TANH TARGET TARGET DATA TARGET Statement TARGET ENTER DATA TARGET EXIT DATA TARGET PARALLEL TARGET PARALLEL DO TARGET PARALLEL DO SIMD TARGET PARALLEL LOOP TARGET SIMD TARGET TEAMS TARGET TEAMS DISTRIBUTE TARGET TEAMS DISTRIBUTE PARALLEL DO TARGET TEAMS DISTRIBUTE PARALLEL DO SIMD TARGET TEAMS DISTRIBUTE SIMD TARGET TEAMS LOOP TARGET UPDATE TASK TASK_REDUCTION TASKGROUP TASKLOOP TASKLOOP SIMD TASKWAIT TASKYIELD TEAM_NUMBER TEAMS TEAMS DISTRIBUTE TEAMS DISTRIBUTE PARALLEL DO TEAMS DISTRIBUTE PARALLEL DO SIMD TEAMS DISTRIBUTE SIMD TEAMS LOOP THIS_IMAGE THREAD_LIMIT THREADPRIVATE TILE TIME Intrinsic Procedure TIME Portability Routine TIMEF TINY TOKENIZE TRACEBACKQQ TRAILZ TRANSFER TRANSPOSE TRIM TTYNAM Type Declarations TYPE Statement for Derived Types UBOUND UCOBOUND UNDEFINE UNION and END UNION UNLINK UNPACK UNPACKTIMEQQ UNROLL Directive for OpenMP UNROLL and NOUNROLL General Directives UNROLL_AND_JAM and NOUNROLL_AND_JAM UNTIED Clause USE USE_DEVICE_PTR Clause %VAL VALUE VECREMAINDER Clause VECTOR and NOVECTOR VERIFY VIRTUAL VOLATILE WAIT WHERE WORKDISTRIBUTE WORKSHARE WRITE Statement XOR ZEXT

POSIX* Library Routines x

IPXFARGC IPXFCONST IPXFLENTRIM IPXFWEXITSTATUS IPXFWSTOPSIG IPXFWTERMSIG PXFGET PXFSET PXFAGET PXFASET PXFACCESS PXFALARM PXFCALLSUBHANDLE PXFCFGETISPEED PXFCFGETOSPEED PXFCFSETISPEED PXFCFSETOSPEED PXFCHDIR PXFCHMOD PXFCHOWN PXFCLEARENV PXFCLOSE PXFCLOSEDIR PXFCONST PXFCREAT PXFCTERMID PXFDUP, PXFDUP2 PXFEGET PXFESET PXFEXECV PXFEXECVE PXFEXECVP PXFEXIT, PXFFASTEXIT PXFFCNTL PXFFDOPEN PXFFFLUSH PXFFGETC PXFFILENO PXFFORK PXFFPATHCONF PXFFPUTC PXFFSEEK PXFFSTAT PXFFTELL PXFGETARG PXFGETC PXFGETCWD PXFGETEGID PXFGETENV PXFGETEUID PXFGETGID PXFGETGRGID PXFGETGRNAM PXFGETGROUPS PXFGETLOGIN PXFGETPGRP PXFGETPID PXFGETPPID PXFGETPWNAM PXFGETPWUID PXFGETSUBHANDLE PXFGETUID PXFISATTY PXFISBLK PXFISCHR PXFISCONST PXFISDIR PXFISFIFO PXFISREG PXFKILL PXFLINK PXFLOCALTIME PXFLSEEK PXFMKDIR PXFMKFIFO PXFOPEN PXFOPENDIR PXFPATHCONF PXFPAUSE PXFPIPE PXFPOSIXIO PXFPUTC PXFREAD PXFREADDIR PXFRENAME PXFREWINDDIR PXFRMDIR PXFSETENV PXFSETGID PXFSETPGID PXFSETSID PXFSETUID PXFSIGACTION PXFSIGADDSET PXFSIGDELSET PXFSIGEMPTYSET PXFSIGFILLSET PXFSIGISMEMBER PXFSIGPENDING PXFSIGPROCMASK PXFSIGSUSPEND PXFSLEEP PXFSTAT PXFSTRUCTCOPY PXFSTRUCTCREATE PXFSTRUCTFREE PXFSYSCONF PXFTCDRAIN PXFTCFLOW PXFTCFLUSH PXFTCGETATTR PXFTCGETPGRP PXFTCSENDBREAK PXFTCSETATTR PXFTCSETPGRP PXFTIME PXFTIMES PXFTTYNAME PXFUCOMPARE PXFUMASK PXFUNAME PXFUNLINK PXFUTIME PXFWAIT PXFWAITPID PXFWIFEXITED PXFWIFSIGNALED PXFWIFSTOPPED PXFWRITE

Automation Server and Component Object Model Library Routines x

AUTOAddArg AUTOAllocateInvokeArgs AUTODeallocateInvokeArgs AUTOGetExceptInfo AUTOGetProperty AUTOGetPropertyByID AUTOGetPropertyInvokeArgs AUTOInvoke AUTOSetProperty AUTOSetPropertyByID AUTOSetPropertyInvokeArgs COMAddObjectReference COMCLSIDFromProgID COMCLSIDFromString COMCreateObject COMCreateObjectByGUID COMCreateObjectByProgID COMGetActiveObjectByGUID COMGetActiveObjectByProgID COMGetFileObject COMInitialize COMIsEqualGUID COMQueryInterface COMReleaseObject COMStringFromGUID COMUninitialize

National Language Support Library Routines x

MBCharLen MBConvertMBToUnicode MBConvertUnicodeToMB MBCurMax MBINCHARQQ MBINDEX MBJISToJMS, MBJMSToJIS MBLead MBLen MBLen_Trim MBLGE, MBLGT, MBLLE, MBLLT, MBLEQ, MBLNE MBNext MBPrev MBSCAN MBStrLead MBVERIFY NLSEnumCodepages NLSEnumLocales NLSFormatCurrency NLSFormatDate NLSFormatNumber NLSFormatTime NLSGetEnvironmentCodepage NLSGetLocale NLSGetLocaleInfo NLSSetEnvironmentCodepage NLSSetLocale

QuickWin Library Routines x

ABOUTBOXQQ APPENDMENUQQ CLICKMENUQQ DELETEMENUQQ FOCUSQQ GETACTIVEQQ GETEXITQQ GETHWNDQQ GETUNITQQ GETWINDOWCONFIG GETWSIZEQQ INCHARQQ INITIALSETTINGS INQFOCUSQQ INSERTMENUQQ INTEGERTORGB MESSAGEBOXQQ MODIFYMENUFLAGSQQ MODIFYMENUROUTINEQQ MODIFYMENUSTRINGQQ PASSDIRKEYSQQ REGISTERMOUSEEVENT RGBTOINTEGER SETACTIVEQQ SETEXITQQ SETMESSAGEQQ SETMOUSECURSOR SETWINDOWCONFIG SETWINDOWMENUQQ SETWSIZEQQ UNREGISTERMOUSEEVENT WAITONMOUSEEVENT

Graphics Library Routines x

ARC, ARC_W CLEARSCREEN DISPLAYCURSOR ELLIPSE, ELLIPSE_W FLOODFILL, FLOODFILL_W FLOODFILLRGB, FLOODFILLRGB_W GETARCINFO GETBKCOLOR GETBKCOLORRGB GETCOLOR GETCOLORRGB GETCURRENTPOSITION, GETCURRENTPOSITION_W GETFILLMASK GETFONTINFO GETGTEXTEXTENT GETGTEXTROTATION GETIMAGE, GETIMAGE_W GETLINESTYLE GETLINEWIDTHQQ GETPHYSCOORD GETPIXEL, GETPIXEL_W GETPIXELRGB, GETPIXELRGB_W GETPIXELS GETPIXELSRGB GETTEXTCOLOR GETTEXTCOLORRGB GETTEXTPOSITION GETTEXTWINDOW GETVIEWCOORD, GETVIEWCOORD_W GETWINDOWCOORD GETWRITEMODE GRSTATUS IMAGESIZE, IMAGESIZE_W INITIALIZEFONTS LINETO, LINETO_W LINETOAR LINETOAREX LOADIMAGE, LOADIMAGE_W MOVETO, MOVETO_W OUTGTEXT OUTTEXT PIE, PIE_W POLYBEZIER, POLYBEZIER_W POLYBEZIERTO, POLYBEZIERTO_W POLYGON, POLYGON_W POLYLINEQQ PUTIMAGE, PUTIMAGE_W RECTANGLE, RECTANGLE_W REMAPALLPALETTERGB, REMAPPALETTERGB SAVEIMAGE, SAVEIMAGE_W SCROLLTEXTWINDOW SETBKCOLOR SETBKCOLORRGB SETCLIPRGN SETCOLOR SETCOLORRGB SETFILLMASK SETFONT SETGTEXTROTATION SETLINESTYLE SETLINEWIDTHQQ SETPIXEL, SETPIXEL_W SETPIXELRGB, SETPIXELRGB_W SETPIXELS SETPIXELSRGB SETTEXTCOLOR SETTEXTCOLORRGB SETTEXTCURSOR SETTEXTPOSITION SETTEXTWINDOW SETVIEWORG SETVIEWPORT SETWINDOW SETWRITEMODE WRAPON

Serial Port I/O Library Routines x

SPORT_CANCEL_IO SPORT_CONNECT SPORT_CONNECT_EX SPORT_GET_HANDLE SPORT_GET_STATE SPORT_GET_STATE_EX SPORT_GET_TIMEOUTS SPORT_PEEK_DATA SPORT_PEEK_LINE SPORT_PURGE SPORT_READ_DATA SPORT_READ_LINE SPORT_RELEASE SPORT_SET_STATE SPORT_SET_STATE_EX SPORT_SET_TIMEOUTS SPORT_SHOW_STATE SPORT_SPECIAL_FUNC SPORT_WRITE_DATA SPORT_WRITE_LINE

Dialog Library Routines x

DLGEXIT DLGFLUSH DLGGET, DLGGETINT, DLGGETLOG, DLGGETCHAR DLGINIT, DLGINITWITHRESOURCEHANDLE DLGISDLGMESSAGE, DLGISDLGMESSAGEWITHDLG DLGMODAL, DLGMODALWITHPARENT DLGMODELESS DLGSENDCTRLMESSAGE DLGSET, DLGSETINT, DLGSETLOG, DLGSETCHAR DLGSETCTRLEVENTHANDLER DLGSETRETURN DLGSETSUB DLGSETTITLE DLGUNINIT

Glossary x

Glossary A Glossary B Glossary C Glossary D Glossary E Glossary F Glossary G Glossary H Glossary I Glossary K Glossary L Glossary M Glossary N Glossary O Glossary P Glossary Q Glossary R Glossary S Glossary T Glossary U Glossary V Glossary W Glossary Z

Compilation x

Supported Environment Variables Use Other Methods to Set Environment Variables Files Associated with Intel® Fortran Applications Compile and Link Multithreaded Programs Ahead of Time Compilation Use Configuration Files Use Response Files Create Fortran Executables Link Debug Information Debugging

Debugging x

Prepare Your Program for Debugging Use Breakpoints in the Microsoft Debugger Debug the Squares Example with Microsoft* Debugger View Fortran Data Types in the Microsoft Debugger View the Call Stack in the Microsoft Debugger Locate Unaligned Data Debug a Program that Encounters a Signal or Exception Debugging and Optimizations Debug Mixed-Language Programs Debug Multithreaded Programs Use Remote Debugging

Use Remote Debugging x

Remote Debugging Scenario

Program Structure x

Use Module Files Use Include Files Advantages of Internal Procedures Implications for Array Copies

Optimization and Programming x

OpenMP* Support Compiler Sanitizers Coarrays Vectorization High-Level Optimization Interprocedural Optimization Fortran Language Extensions fpp Preprocessing Methods to Optimize Code Size Optimization Reports National Language Support Routines

OpenMP* Support x

Add OpenMP* Support Parallel Processing Model Control Thread Allocation OpenMP* Library Support OpenMP* Contexts OpenMP* Offloading SPMD/SIMT and SIMD Models OpenMP* Advanced Issues OpenMP* Implementation-Defined Behaviors OpenMP* Examples

OpenMP* Library Support x

OpenMP* Runtime Library Routines Intel® Compiler Extension Routines to OpenMP* OpenMP* Support Libraries Use the OpenMP* Libraries Thread Affinity Interface OpenMP* Memory Spaces and Allocators

OpenMP* Contexts x

OpenMP* Context Selectors Score and Match Context Selectors

Coarrays x

Use Coarrays Debug a Coarray Application

Vectorization x

Automatic Vectorization Explicit Vector Programming

Automatic Vectorization x

Vectorization Programming Guidelines Use Automatic Vectorization Vectorization and Loops Loop Constructs

Explicit Vector Programming x

User-Mandated or SIMD Vectorization Function Annotations and the SIMD Directive for Vectorization

Interprocedural Optimization x

Use Interprocedural Optimization Performance and Large Program Considerations Inline Expansion of Functions

Fortran Language Extensions x

Support for 64-bit Architecture on Linux Traceback Allocate Common Blocks Generate Listing and Map Files Create Shared Libraries Specify Alternative Tools and Locations Temporary Files Created by the Compiler or Linker Use the Intel® Fortran COM Server on Windows Use the Intel® Fortran Module Wizard (COM Client) on Windows IFPORT Portability Library

Traceback x

Traceback Tradeoffs and Restrictions Sample Programs and Traceback Information

Use the Intel® Fortran COM Server on Windows x

Advantages of a COM Server COM Server Concepts Create the Fortran COM Server Fortran COM Server Interface Design Considerations Advanced COM Server Topics Deploy the COM Server on Another System

Use the Intel® Fortran Module Wizard (COM Client) on Windows x

COM and Automation Objects The Role of the Module Wizard Use the Module Wizard to Generate Code Call the Routines Generated by the Module Wizard Get a Pointer to an Object's Interface Additional Resources about COM and Automation

fpp Preprocessing x

fpp Preprocessor Directives Predefined Preprocessor Symbols Fortran Preprocessor Options

Compatibility and Portability x

Fortran Language Standards Conformance, Compatibility, and Fortran Features Minimize Operating System-Specific Information Store and Represent Data Data Portability

Data Portability x

Format Data for Transportability Supported Native and Non-Native Numeric Formats Port Non-Native Data Specify the Data Format

System Requirements

Release Notes

Get Started

Developer Guide and Reference

Intel® Fortran Compiler Introduction

Get Help and Support

Related Information

Compiler Setup

Use the Command Line

Specify Component Locations

Invoke the Compiler

Use the Command Line on Windows

Run Fortran Applications from the Command Line

File Extensions

Use Makefiles for Compilation

Use Microsoft Visual Studio

Use Microsoft Visual Studio* Solution Explorer

Create a New Project

Perform Common Tasks with Microsoft Visual Studio*

Select a Version of the Intel® Fortran Compiler

Use Visual Studio* IDE Automation Objects

Specify Fortran File Extensions

Understand Solutions, Projects, and Configurations

Navigate Programmatic Components in a Fortran File

Specify Path, Library, and Include Directories

Set Compiler Options in the Microsoft Visual Studio* IDE Property Pages

Supported Build Macros

Use Manifests

Use Intel® Libraries with Microsoft Visual Studio*

Use Source Editor Enhancements in Microsoft Visual Studio*

Create the Executable Program

Convert and Copy Projects

About Fortran Project Types

Understand Project Types

Specify Project Types with ifx Command Options

Use Fortran Console Application Projects

Use Fortran Standard Graphics Application Projects

Use Fortran QuickWin Application Projects

Use Fortran Windowing Application Projects

Use Fortran Static Library Projects

Use Fortran Dynamic-Link Library Projects

Use the Console

Create Fortran Applications That Use Windows Features

Optimization Reports in Microsoft Visual Studio*

Dialog Box Help

Options: General dialog box

Options: Compilers dialog box

Options: Advanced dialog box

Compiler Reference

Compiler Limits

Compiler Options

Alphabetical Option List

General Rules for Compiler Options

What Appears in the Compiler Option Descriptions

Optimization Options

falias, Oa

fast

foptimize-sibling-calls

fprotect-parens, Qprotect-parens

nolib-inline

Ofast

Advanced Optimization Options

ansi-alias, Qansi-alias

coarray, Qcoarray

coarray-config-file, Qcoarray-config-file

coarray-num-images, Qcoarray-num-images

fvec-allow-scalar-stores, Qvec-allow-scalar-stores

fvec-non-loop-argument-load, Qvec-non-loop-argument-load

fvec-peel-loops, Qvec-peel-loops

fvec-remainder-loops, Qvec-remainder-loops

fvec-with-mask, Qvec-with-mask

heap-arrays

mno-gather, Qgather-

mno-scatter, Qscatter-

pad, Qpad

qmkl, Qmkl

qmkl-ilp64, Qmkl-ilp64

qmkl-sycl-impl, Qmkl-sycl-impl

qopt-dword-index-for-array-of-structs, Qopt-dword-index-for-array-of-structs

qopt-dynamic-align, Qopt-dynamic-align

qopt-for-throughput, Qopt-for-throughput

qopt-matmul, Qopt-matmul

qopt-mem-layout-trans, Qopt-mem-layout-trans

qopt-multiple-gather-scatter-by-shuffles, Qopt-multiple-gather-scatter-by-shuffles

qopt-prefetch, Qopt-prefetch

qopt-prefetch-distance, Qopt-prefetch-distance

qopt-prefetch-loads-only, Qopt-prefetch-loads-only

qopt-streaming-stores, Qopt-streaming-stores

qopt-zmm-usage, Qopt-zmm-usage

qoverride-limits, Qoverride-limits

reentrancy

safe-cray-ptr, Qsafe-cray-ptr

unroll, Qunroll

vec, Qvec

vec-threshold, Qvec-threshold

vecabi, Qvecabi

Code Generation Options

arch

ax, Qax

fasynchronous-unwind-tables

fcf-protection, Qcf-protection

fexceptions

fomit-frame-pointer

guard

m, Qm

m64, Qm64

m80387

march

masm

mauto-arch, Qauto-arch

mbranches-within-32B-boundaries, Qbranches-within-32B-boundaries

momit-leaf-frame-pointer

mtune, tune

x, Qx

xHost, QxHost

Offload Compilation, OpenMP*, and Parallel Processing Options

device-math-lib

fiopenmp, Qiopenmp

flink-huge-device-code

fopenmp, Qopenmp

fopenmp-concurrent-host-device-compile, Qopenmp-concurrent-host-device-compile

fopenmp-declare-target-scalar-defaultmap, Qopenmp-declare-target-scalar-defaultmap

fopenmp-default-allocator, Qopenmp-default-allocator

fopenmp-device-code-split, Qopenmp-device-code-split

fopenmp-device-lib

fopenmp-do-concurrent-maptype-modifier, Qopenmp-do-concurrent-maptype-modifier

fopenmp-max-parallel-link-jobs, Qopenmp-max-parallel-link-jobs

fopenmp-offload-mandatory, Qopenmp-offload-mandatory

fopenmp-target-buffers, Qopenmp-target-buffers

fopenmp-target-default-sub-group-size, Qopenmp-target-default-sub-group-size

fopenmp-target-do-concurrent, Qopenmp-target-do-concurrent

fopenmp-target-loopopt, Qopenmp-target-loopopt

fopenmp-target-simd, Qopenmp-target-simd

fopenmp-targets, Qopenmp-targets

fsycl

fsycl-dead-args-optimization

fsycl-device-code-split

fsycl-device-lib

fsycl-instrument-device-code

fsycl-targets

ftarget-compile-fast

ftarget-register-alloc-mode, Qtarget-register-alloc-mode

nolibsycl

parallel, Qparallel

qopenmp, Qopenmp

qopenmp-link

qopenmp-simd, Qopenmp-simd

qopenmp-stubs, Qopenmp-stubs

Xopenmp-target

Xsycl-target

Interprocedural Optimization Options

flto

ipo, Qipo

Profile Guided Optimization Options

finstrument-functions, Qinstrument-functions

fprofile-ml-use

Optimization Report Options

qopt-report, Qopt-report

qopt-report-file, Qopt-report-file

qopt-report-names, Qopt-report-names

qopt-report-phase, Qopt-report-phase

qopt-report-stdout, Qopt-report-stdout

Floating-Point Options

ffp-accuracy, Qfp-accuracy

fimf-absolute-error, Qimf-absolute-error

fimf-accuracy-bits, Qimf-accuracy-bits

fimf-arch-consistency, Qimf-arch-consistency

fimf-domain-exclusion, Qimf-domain-exclusion

fimf-max-error, Qimf-max-error

fimf-precision, Qimf-precision

fimf-use-svml, Qimf-use-svml

fltconsistency

fma, Qfma

fp-model, fp

fp-speculation, Qfp-speculation

fpe-all

ftz, Qftz

pc, Qpc

prec-div, Qprec-div

recursive

Inlining Options

finline

finline-functions

inline

inline-forceinline, Qinline-forceinline

inline-level, Ob

Output, Debug, and Precompiled Header Options

debug (Linux*)

debug (Windows*)

debug-parameters

fmerge-debug-strings

ftrapuv, Qtrapuv

fverbose-asm

gdwarf

grecord-gcc-switches

gsplit-dwarf

list

list-line-len

list-page-len

object

print-multi-lib

show

Zi, Z7

Preprocessor Options

d-lines, Qd-lines

fpp-name

gen-dep

gen-depformat

gen-depshow

idirafter

isystem

module

preprocess-only

u (Windows*)

undef

Component Control Options

Qinstall

Qlocation

Qoption

Language Options

allow

altparam

assume

ccdefault

check

extend-source

fixed

free

fsanitize

iface

names

pad-source, Qpad-source

stand

standard-realloc-lhs

standard-semantics

syntax-only

wrap-margin

Data Options

align

auto

auto-scalar, Qauto-scalar

convert

double-size

dyncom, Qdyncom

falign-functions, Qfnalign

fmaintain-32-byte-stack-align, Qmaintain-32-byte-stack-align

fmath-errno

fpconstant

fpic

fpie

fstack-protector

fstack-security-check

fstrict-overflow, Qstrict-overflow

fvisibility

fzero-initialized-in-bss, Qzero-initialized-in-bss

init, Qinit

intconstant

integer-size

mcmodel

real-size

save, Qsave

zero, Qzero

Compiler Diagnostic Options

diag, Qdiag

diag-dump, Qdiag-dump

diag-error-limit, Qdiag-error-limit

diag-file, Qdiag-file

diag-file-append, Qdiag-file-append

gen-interfaces

traceback

warn

Compatibility Options

f77rtl

fpscomp

gcc-name

gxx-name

Linking or Linker Options

4Nportlib, 4Yportlib

Bdynamic

Bstatic

Bsymbolic

Bsymbolic-functions

cxxlib

dbglibs

dynamic-linker

extlnk

F (Windows*)

fortlib

fuse-ld

libs

link

nodefaultlibs

nofor-main

no-intel-lib, Qno-intel-lib

nostartfiles

nostdlib

pthread

shared

shared-intel

shared-libgcc

static

static-intel

static-libgcc

static-libstdc++

threads

winapp

Xlinker

Miscellaneous Options

dryrun

dumpmachine

extfor

extfpp

fpreview-breaking-changes

global-hoist, Qglobal-hoist

help

intel-freestanding

intel-freestanding-target-os

libdir

logo

multiple-processes, MP

save-temps, Qsave-temps

sysroot

watch

what

Deprecated and Removed Compiler Options

Display Option Information

Alternate Compiler Options

Floating-Point Operations

Floating-Point Optimizations

Subnormal Numbers

Floating-Point Environment

Set the FTZ and DAZ Flags

Tuning Performance

Libraries

Create Libraries

Call Library Routines

Comparison of Intel® Fortran Compiler and Windows API Routines

Specify Consistent Library Types on Windows

Redistribute Libraries When Deploying Applications

Resolve References to Shared Libraries

Redistributable Library Considerations

Store Object Code in Static Libraries

Store Routines in Shareable Libraries

Use Windows API Routines

Include the Intel® Fortran Interface Definitions for Windows API Routines

Call Windows API Routines

Supplied Windows API Modules

Math Libraries

Data and I/O

Data Representation

Integer Data Representations

INTEGER(KIND=1) Representation

INTEGER(KIND=2) Representation

INTEGER(KIND=4) Representation

INTEGER(KIND=8) Representation

Logical Data Representations

Character Representation

Hollerith Representation

Fortran I/O

Logical Devices

Physical Devices on Windows

Types of I/O Statements

Forms of I/O Statements

Assign Files to Logical Units

File Organization

Internal Files and Scratch Files

File Access and File Structure

File Records

Record Types

Record Length

Record Access

Record Transfer

Specify Default Pathnames and File Names

Open Files: OPEN Statement

Obtain File Information: INQUIRE Statement

Close Files: CLOSE Statement

Record I/O Statement Specifiers

File Sharing on Linux

Specify the Initial Record Position

Advancing and Nonadvancing Record I/O

Use USEROPEN to Pass Control To a Routine

Microsoft Fortran PowerStation Compatible Files

Use Asynchronous I/O

Mixed-Language Programming

Standard Fortran and C Interoperability

Use Standard Fortran Interoperability Syntax for Existing Fortran Extensions

Standard Tools for Interoperability

ISO_C_BINDING

BIND(C)

Interoperate with Arguments Using C Descriptors

C Structures, Typedefs, and Macros for Interoperability

Data Types

Scalar Types

Characters

Pointers

Derived Types

Variables

Global Data

Procedures

Platform Specifics

Mixed-Language Issues

Call Subprograms from the Main Program on Windows

Pass Arguments in Mixed-Language Programming

Stack Considerations in Calling Conventions on Windows

Naming Conventions

C/C++ Naming Conventions

Compile and Link Intel® Fortran and C/C++ Programs

Build Intel® Fortran and C Mixed-Language Programs on Windows

Implementation Specifics

Fortran Module Naming Conventions

Handle Fortran Array Pointers and Allocatable Arrays

Handle Fortran Array Descriptors

Return Character Data Types

Legacy Extensions

ATTRIBUTES Directive Properties

ALIAS Property for ATTRIBUTES Directive

Use the -nofor-main Compiler Option

Error Handling

Build Process Errors

Runtime Errors

Understand Runtime Errors

Runtime Default Error Processing

Runtime Message Display and Format

Values Returned at Program Termination

Methods of Handling Errors

Locate Runtime Errors

List of Runtime Error Messages

Signal Handling on Linux*

Override the Default Runtime Library Exception Handler

Advanced Exception and Termination Handling

Default Exception Handling

Default Console Event Handling

Default Termination Handling

Handlers for the Application Types

Provide Your Own Exception or Termination Handler

Use Windows* Structured Exception Handling

Establish Console Event Handlers

Use SIGNALQQ

Language Reference

New Features

Language Reference Conventions

Program Elements and Source Forms

Program Units

Statements

Keywords

Names

Character Sets

Source Forms

Free Source Form

Fixed and Tab Source Forms

Fixed-Format Lines

Tab-Format Lines

Source Code Useable for All Source Forms

Data Types, Constants, and Variables

Intrinsic Data Types

Integer Data Types

Integer Constants

Real Data Types

General Rules for Real Constants

REAL(4) Constants

REAL(8) or DOUBLE PRECISION Constants

REAL(16) Constants

Complex Data Types

General Rules for Complex Constants

COMPLEX(4) Constants

COMPLEX(8) or DOUBLE COMPLEX Constants

COMPLEX(16) Constants

Logical Data Types

Logical Constants

Character Data Type

Character Constants

C Strings in Character Constants

Character Substrings

Derived Data Types

Default Initialization

Procedure Pointers as Derived-Type Components

Type-Bound Procedures

Type Extension

Parameterized Derived-Type Declarations

Parameterized TYPE Statements

Structure Constructors for Parameterized Derived Types

Type Parameter Order for Parameterized Derived Types

Deferred-Length Type Parameters for Parameterized Derived Types

Assumed-Length Type Parameters for Parameterized Derived Types

Structure Components

Structure Constructors

Binary, Octal, Hexadecimal, and Hollerith Constants

Binary Constants

Octal Constants

Hexadecimal Constants

Hollerith Constants

Determine the Data Type of Nondecimal Constants

Enumerations and Enumerators

Variables

Data Types of Scalar Variables

Specification of Data Type

Implicit Typing Rules

Arrays

Whole Arrays

Array Elements

Array Sections

Subscript Triplets

Vector Subscripts

Array Constructors

Coarrays

Image Selectors

Established Coarrays

Deferred-Coshape Coarrays

Explicit-Coshape Coarrays

Reference Coarray Images

Specify Data Objects for Coarray Images

Variable-Definition Context

Expressions and Assignment Statements

Expressions

Numeric Expressions

Parentheses in Numeric Expressions

Data Type of Numeric Expressions

Character Expressions

Relational Expressions

Logical Expressions

Defined Operations

Summary of Operator Precedence

Constant and Specification Expressions

Constant Expressions

Specification Expressions

Assignments

Intrinsic Assignment Statements

Numeric Assignment Statements

Logical Assignment Statements

Character Assignment Statements

Derived-Type Assignment Statements

Array Assignment Statements

Examples of Intrinsic Assignment to Polymorphic Variables

Defined Assignment Statements

Pointer Assignments

Specification Statements

Type Declarations

Declarations for Noncharacter Types

Declarations for Character Types

Declarations for Derived Types

Declarations for Other Nonintrinsic Types

Declarations for Arrays

Explicit-Shape Specifications

Assumed-Shape Specifications

Assumed-Size Specifications

Assumed-Rank Specifications

Deferred-Shape Specifications

Implied-Shape Specifications

Effects of Equivalency and Interaction with COMMON Statements

Make Arrays Equivalent

Make Substrings Equivalent

EQUIVALENCE and COMMON Interaction

Dynamic Allocation

Effects of Allocation

Allocation of Allocatable Variables

Allocation of Allocatable Arrays

Allocation of Pointer Targets

Effects of Deallocation

Deallocation of Allocatable Variables

Deallocation of Allocatable Arrays

Deallocation of Pointer Targets

Execution Control

Program Termination

Branch Statements Overview

Effects of DO Constructs

Iteration Loop Control

Nested DO Constructs

Extended Range

Image Control Statements

STAT= and ERRMSG= Specifiers in Image Control Statements

Execution Segments for Images

Program Units and Procedures

Main Program

Procedure Characteristics

Modules and Module Procedures

Separate Module Procedures

Intrinsic Modules

ISO_C_BINDING Module

Named Constants in the ISO_C_BINDING Module

Intrinsic Module Procedures - ISO_C_BINDING

ISO_FORTRAN_ENV Module

Named Constants in the ISO_FORTRAN_ENV Module

Derived Types in the ISO_FORTRAN_ENV Module

Intrinsic Module Procedures - ISO_FORTRAN_ENV

IEEE Intrinsic Modules and Procedures

IEEE_ARITHMETIC Intrinsic Module

IEEE_EXCEPTIONS Intrinsic Module

IEEE_FEATURES Intrinsic Module

IEEE Intrinsic Modules Quick Reference Tables

Block Data Program Units Overview

Functions, Subroutines, and Statement Functions

General Rules for Function and Subroutine Subprograms

Recursive Procedures

Pure Procedures

Impure Procedures

Elemental Procedures

Functions Overview

RESULT Keyword Overview

Function References

Subroutines Overview

Statement Functions Overview

Entry Points in Subprograms

Entry Points in Function Subprograms

Entry Points in Subroutine Subprograms

External Procedures

Internal Procedures

Argument Association in Procedures

Optional Arguments

Array Arguments

Pointer Arguments

Passed-Object Dummy Arguments

Assumed-Length Character Arguments

Character Constant and Hollerith Arguments

Alternate Return Arguments

Dummy Procedure Arguments

Coarray Dummy Arguments

References to Generic Procedures

References to Generic Intrinsic Functions

References to Elemental Intrinsic Procedures

References to Non-Fortran Procedures

Procedure Interfaces

Procedures that Require Explicit Interfaces

Explicit and Abstract Interfaces

Define Generic Names for Procedures

Define Generic Operators

Define Generic Assignment

Interoperability of Procedures and Procedure Interfaces

Procedure Pointers

Intrinsic Procedures

Argument Keywords in Intrinsic Procedures

Overview of Atomic Subroutines

Overview of Collective Subroutines

Overview of Bit Functions

Categories and Lists of Intrinsic Procedures

Categories of Intrinsic Functions

Intrinsic Subroutines

Data Transfer I/O Statements

Records and Files

Components of Data Transfer Statements

I/O Control List

Advance Specifier (ADVANCE=)

Asynchronous Specifier (ASYNCHRONOUS=)

Blank Specifier (BLANK=)

Branch Specifiers (END=, EOR=, ERR=)

Character Count Specifier (SIZE=)

Decimal Specifier (DECIMAL=)

Delimiter Specifier (DELIM=)

Format Specifier (FMT=)

Identification Specifier (ID=)

I/O Message Specifier (IOMSG=)

I/O Status Specifier (IOSTAT=)

Namelist Specifier (NML=)

Padding Specifier (PAD=)

Position Specifier (POS=)

Record Specifier (REC=)

Rounding Specifier (ROUND=)

Sign Specifier (SIGN=)

Unit Specifier (UNIT=)

I/O Lists

Simple List Items in I/O Lists

Implied-DO Lists in I/O Lists

Forms for READ Statements

Forms for Sequential READ Statements

Rules for Formatted Sequential READ Statements

Rules for List-Directed Sequential READ Statements

Rules for Namelist Sequential READ Statements

Rules for Unformatted Sequential READ Statements

Forms for Direct-Access READ Statements

Rules for Formatted Direct-Access READ Statements

Rules for Unformatted Direct-Access READ Statements

Forms for Stream READ Statements

Forms and Rules for Internal READ Statements

Forms for WRITE Statements

Forms for Sequential WRITE Statements

Rules for Formatted Sequential WRITE Statements

Rules for List-Directed Sequential WRITE Statements

Rules for Namelist Sequential WRITE Statements

Rules for Unformatted Sequential WRITE Statements

Forms for Direct-Access WRITE Statements

Rules for Formatted Direct-Access WRITE Statements

Rules for Unformatted Direct-Access WRITE Statements

Forms for Stream WRITE Statements

Forms and Rules for Internal WRITE Statements

User-Defined Derived-Type I/O

Specify the User-Defined Derived Type

DT Edit Descriptor in User-Defined I/O

Associate a Procedure with Defined I/O

Defined I/O Procedures

Generic Bindings

Generic Interface Block

Characteristics of Defined I/O Procedures

Defined I/O Data Transfers

Distinguish Between Defined I/O Procedure References

Recursive Defined I/O

Examples of User-Defined Derived-Type I/O

I/O Formatting

Format Specifications

Data Edit Descriptors

Forms for Data Edit Descriptors

General Rules for Numeric Editing

Integer Editing

I Editing

B Editing

O Editing

Z Editing

Real and Complex Editing

F Editing

E and D Editing

EN Editing

ES Editing

EX Editing

G Editing

Complex Editing

Logical Editing (L)

Character Editing (A and AT)

Defined I/O Editing (DT)

Default Widths for Data Edit Descriptors

Terminating Short Fields of Input Data

Control Edit Descriptors

Forms for Control Edit Descriptors

Positional Editing

T Editing

TL Editing

TR Editing

X Editing

Sign Editing

SP Editing

SS Editing

S Editing

Blank Editing

BN Editing

BZ Editing

Round Editing

RU Editing

RD Editing

RZ Editing

RN Editing

RC Editing

RP Editing

Decimal Editing

DC Editing

DP Editing

Scale-Factor Editing (P)

Slash Editing ( / )

Colon Editing (:)

Dollar-Sign ($) and Backslash ( \ ) Editing

Character Count Editing (Q)

Character String Edit Descriptors

Character Constant Editing

H Editing

Nested and Group Repeat Specifications

Variable Format Expressions

Print Formatted Records

Interaction Between Format Specifications and I/O Lists

File Operation I/O Statements

INQUIRE Statement Specifiers

INQUIRE: ACCESS Specifier

INQUIRE: ACTION Specifier

INQUIRE: ASYNCHRONOUS Specifier

INQUIRE: BINARY Specifier

INQUIRE: BLANK Specifier

INQUIRE: BLOCKSIZE Specifier

INQUIRE: BUFFERED Specifier

INQUIRE: CARRIAGECONTROL Specifier

INQUIRE: CONVERT Specifier

INQUIRE: DECIMAL Specifier

INQUIRE: DELIM Specifier

INQUIRE: DIRECT Specifier

INQUIRE: ENCODING Specifier

INQUIRE: EXIST Specifier

INQUIRE: FORM Specifier

INQUIRE: FORMATTED Specifier

INQUIRE: ID Specifier

INQUIRE: IOFOCUS Specifier

INQUIRE: IOLENGTH Specifier

INQUIRE: IOMSG Specifier

INQUIRE: IOSTAT Specifier

INQUIRE: MODE Specifier

INQUIRE: NAME Specifier

INQUIRE: NAMED Specifier

INQUIRE: NEXTREC Specifier

INQUIRE: NUMBER Specifier

INQUIRE: OPENED Specifier

INQUIRE: ORGANIZATION Specifier

INQUIRE: PAD Specifier

INQUIRE: PENDING Specifier

INQUIRE: POS Specifier

INQUIRE: POSITION Specifier

INQUIRE: READ Specifier

INQUIRE: READWRITE Specifier

INQUIRE: RECL Specifier

INQUIRE: RECORDTYPE Specifier

INQUIRE: ROUND Specifier

INQUIRE: SEQUENTIAL Specifier

INQUIRE: SHARE Specifier

INQUIRE: SIGN Specifier

INQUIRE: SIZE Specifier

INQUIRE: STREAM Specifier

INQUIRE: UNFORMATTED Specifier

INQUIRE: WRITE Specifier

OPEN Statement Specifiers

OPEN: ACCESS Specifier

OPEN: ACTION Specifier

OPEN: ASSOCIATEVARIABLE Specifier

OPEN: ASYNCHRONOUS Specifier

OPEN: BLANK Specifier

OPEN: BLOCKSIZE Specifier

OPEN: BUFFERCOUNT Specifier

OPEN: BUFFERED Specifier

OPEN: CARRIAGECONTROL Specifier

OPEN: CONVERT Specifier

OPEN: DECIMAL Specifier

OPEN: DEFAULTFILE Specifier

OPEN: DELIM Specifier

OPEN: DISPOSE Specifier

OPEN: ENCODING Specifier

OPEN: FILE Specifier

OPEN: FORM Specifier

OPEN: IOFOCUS Specifier

OPEN: MAXREC Specifier

OPEN: MODE Specifier

OPEN: NAME Specifier

OPEN: NEWUNIT Specifier

OPEN: NOSHARED Specifier

OPEN: ORGANIZATION Specifier

OPEN: PAD Specifier

OPEN: POSITION Specifier

OPEN: READONLY Specifier

OPEN: RECL Specifier

OPEN: RECORDSIZE Specifier

OPEN: RECORDTYPE Specifier

OPEN: ROUND Specifier

OPEN: SHARE Specifier

OPEN: SHARED Specifier

OPEN: SIGN Specifier

OPEN: STATUS Specifier

OPEN: TITLE Specifier

OPEN: TYPE Specifier

OPEN: USEROPEN Specifier

Compilation Control Lines and Statements

Directive Enhanced Compilation

Syntax Rules for Compiler Directives

General Compiler Directives

Rules for Placement of Directives

Rules for General Directives that Affect DO Loops

Rules for Loop Directives that Affect Array Assignment Statements

OpenMP* Fortran Compiler Directives

Categories for OpenMP* Fortran Directives

Clauses Used in Multiple OpenMP* Fortran Directives

Conditional Compilation Rules

Rules for Nesting and Binding

Equivalent Compiler Options

Scope and Association

Scope

Unambiguous Generic Procedure References

Resolve Procedure References

References to Generic Names

References to Specific Names

References to Non-Established Names

Association

Name Association

Argument Association

Use and Host Association

Use Association

Host Association

Linkage Association

Construct Association

Additional Attributes of Associate Names

Pointer Association

Storage Association

Storage Units and Storage Sequence

Array Association

Inheritance Association

Deleted and Obsolescent Language Features

Deleted Language Features in the Fortran Standard

Obsolescent Language Features in the Fortran Standard

Additional Language Features

FORTRAN 66 Interpretation of the EXTERNAL Statement

Alternative Syntax for the PARAMETER Statement

Alternative Syntax for Binary, Octal, and Hexadecimal Constants

Alternative Syntax for a Record Specifier

Alternative Syntax for the DELETE Statement

Alternative Form for Namelist External Records

Record Structures

Structure Declarations

Type Declarations within Record Structures

Substructure Declarations

References to Record Fields

Aggregate Assignment

Additional Character Sets

Character and Key Code Charts for Windows*

ASCII Character Codes for Windows*

ASCII Character Codes Chart 1 (Windows)

ASCII Character Codes Chart 2: IBM* Character Set (Windows)

ANSI Character Codes for Windows*

ANSI Character Codes Chart (Windows)

Key Codes for Windows*

Key Codes Chart 1 (Windows)

Key Codes Chart 2 (Windows)

ASCII Character Set for Linux*

Data Representation Models

Model for Integer Data

Model for Real Data

Model for Bit Data

Bit Sequence Comparisons

Library Modules and Runtime Library Routines

Runtime Library Routines

NLS and MCBS Routines on Windows

Standard Fortran Routines that Handle MBCS Characters on Windows

Portability Routines

Serial Port I/O Routines on Windows

Summary of Language Extensions

Language Extensions: Source Forms

Language Extensions: Names

Language Extensions: Character Sets

Language Extensions: Intrinsic Data Types

Language Extensions: Constants

Language Extensions: Expressions and Assignment

Language Extensions: Specification Statements

Language Extensions: Execution Control

Language Extensions: Compilation Control Lines and Statements

Language Extensions: Built-In Functions

Language Extensions: I/O Statements

Language Extensions: I/O Formatting

Language Extensions: File Operation Statements

Language Extensions: Compiler Directives

Language Extensions: Intrinsic Procedures

Language Extensions: Additional Language Features

Language Extensions: Runtime Library Routines

A to Z Reference

Language Summary Tables

Statements for Program Unit Calls and Definitions

Statements Affecting Variables

Statements and Intrinsic Functions for Input and Output

Compiler Directives

Program Control Statements

Inquiry Intrinsic Functions

Random Number Intrinsic Procedures

Atomic Intrinsic Subroutines

Collective Intrinsic Subroutines

Date and Time Intrinsic Subroutines

Keyboard and Speaker Library Routines

Statements and Intrinsic Procedures for Memory Allocation and Deallocation

Intrinsic Functions for Arrays and Coarrays

Intrinsic Functions for Numeric and Type Conversion

Trigonometric, Bessel, Exponential, Root, and Logarithmic Intrinsic Procedures

Intrinsic Functions for Floating-Point Inquiry and Control

Character Intrinsic Functions

Intrinsic Procedures for Bit Operation and Representation

QuickWin Library Routines Summary

Graphics Library Routines Summary

Portability Library Routines

National Language Support Library Routines Summary

POSIX* Library Procedures Summary

Dialog Library Routines Summary

COM and Automation Library Routines

Miscellaneous Runtime Library Routines

A to B

ABORT

ABSTRACT INTERFACE

ACCESS Function

ACHAR

ACOS

ACOSD

ACOSH

ADJUSTL

ADJUSTR

AIMAG

AINT

ALARM

ALIAS Directive

ALIGNED Clause

ALLOCATABLE

ALLOCATE Clause

ALLOCATE Directive

ALLOCATE Statement

ALLOCATED

ALLOCATORS

ANINT

ASIN

ASIND

ASINH

ASSIGN - Label Assignment

Assignment(=) - Defined Assignment

Assignment - Intrinsic Computational

ASSOCIATE

ASSOCIATED

ASSUME

ASSUME_ALIGNED

ASSUMES Directive for OpenMP

ASSUMPTION Clause

ASYNCHRONOUS

ATAN

ATAN2

ATAN2D

ATAND

ATANH

ATOMIC

ATOMIC_ADD

ATOMIC_AND

ATOMIC_CAS

ATOMIC_DEFINE

ATOMIC_FETCH_ADD

ATOMIC_FETCH_AND

ATOMIC_FETCH_OR

ATOMIC_FETCH_XOR

ATOMIC_OR

ATOMIC_REF

ATOMIC_XOR

ATTRIBUTES

ATTRIBUTES ALIAS

ATTRIBUTES ALIGN

ATTRIBUTES ALLOCATABLE

ATTRIBUTES ALLOW_NULL

ATTRIBUTES C and STDCALL

ATTRIBUTES CODE_ALIGN

ATTRIBUTES CONCURRENCY_SAFE

ATTRIBUTES CVF

ATTRIBUTES DECORATE

ATTRIBUTES DEFAULT

ATTRIBUTES DLLEXPORT and DLLIMPORT

ATTRIBUTES EXTERN

ATTRIBUTES INLINE, NOINLINE, and FORCEINLINE

ATTRIBUTES IGNORE_LOC

ATTRIBUTES MIXED_STR_LEN_ARG and NOMIXED_STR_LEN_ARG

ATTRIBUTES NO_ARG_CHECK

ATTRIBUTES NOCLONE

ATTRIBUTES REFERENCE and VALUE

ATTRIBUTES VARYING

ATTRIBUTES VECTOR

AUTOMATIC

BACKSPACE

BADDRESS

BARRIER

BEEPQQ

BESJ0, BESJ1, BESJN, BESY0, BESY1, BESYN

BESSEL_J0

BESSEL_J1

BESSEL_JN

BESSEL_Y0

BESSEL_Y1

BESSEL_YN

BIC, BIS

BIND

BIT_SIZE

BLOCK

BLOCK DATA

BLOCK_LOOP and NOBLOCK_LOOP

BSEARCHQQ

BTEST

BYTE

C to D

C_ASSOCIATED

C_F_POINTER

C_F_PROCPOINTER

C_F_STRPOINTER

C_FUNLOC

C_LOC

C_SIZEOF

CACHESIZE

CALL

CANCEL

CANCELLATION POINT

CASE

CDFLOAT

CEILING

CFI_address

CFI_allocate

CFI_deallocate

CFI_establish

CFI_is_contiguous

CFI_section

CFI_select_part

CFI_setpointer

CHANGEDIRQQ

CHANGEDRIVEQQ

CHANGE TEAM and END TEAM

CHAR

CHARACTER

CHDIR

CHMOD

CLASS

CLEARSTATUSFPQQ

CLOCK

CLOCKX

CMPLX

CO_BROADCAST

CO_MAX

CO_MIN

CO_REDUCE

CO_SUM

CODE_ALIGN

CODIMENSION

COLLAPSE Clause

COMMAND_ARGUMENT_COUNT

COMMITQQ

COMMON

COMPILER_OPTIONS

COMPILER_VERSION

COMPLEX Statement

COMPLINT, COMPLREAL, COMPLLOG

CONJG

CONTAINS

CONTIGUOUS

CONTINUE

COPYIN Clause

COPYPRIVATE Clause

COSD

COSH

COSHAPE

COTAN

COTAND

COUNT

CPU_TIME

CRITICAL Directive

CRITICAL Statement

CSHIFT

CSMG

CTIME

CYCLE

DATA

DATE Intrinsic Procedure

DATE Portability Routine

DATE4

DATE_AND_TIME

DBESJ0, DBESJ1, DBESJN, DBESY0, DBESY1, DBESYN

DBLE

DCLOCK

DCMPLX

DEALLOCATE

DECLARE and NODECLARE

DECLARE MAPPER

DECLARE REDUCTION

DECLARE SIMD

DECLARE TARGET

DECLARE VARIANT

DECODE

DEFAULT Clause

DEFINE and UNDEFINE

DEFINE FILE

DELDIRQQ

DELETE

DELFILESQQ

DEPEND Clause

DEPOBJ

DEVICE Clause

DEVICE_TYPE Clause

DFLOAT

DFLOATI, DFLOATJ, DFLOATK

DIGITS

Results
Example
See Also

DIMENSION

DISPATCH

DISTRIBUTE

DISTRIBUTE PARALLEL DO

DISTRIBUTE PARALLEL DO SIMD

DISTRIBUTE POINT

DISTRIBUTE SIMD

DNUM

DO Directive

DO Statement

DO CONCURRENT

DO SIMD

DO WHILE

DOT_PRODUCT

DOUBLE COMPLEX

DOUBLE PRECISION

DPROD

DRAND, DRANDM

DRANSET

DREAL

DSHIFTL

DSHIFTR

DTIME

E to F

ELEMENTAL

ELSE Directive

ELSE Statement

ELSEIF Directive

ELSE IF

ELSE WHERE

ENCODE

END DO

ENDIF Directive

END IF

ENDFILE

END FORALL

END INTERFACE

END TYPE

END WHERE

ENTRY

EOSHIFT

EPSILON

EQUIVALENCE

ERFC

ERFC_SCALED

ERROR Directive for OpenMP

ERRSNS

ESTABLISHQQ

ETIME

EVENT POST and EVENT WAIT

EVENT_QUERY

EXECUTE_COMMAND_LINE

EXIT Statement

EXIT Subroutine

EXP10

EXPONENT

EXTENDS_TYPE_OF

EXTERNAL

F_C_STRING

FAIL IMAGE

FAILED_IMAGES

FDATE

FGETC

FINAL Clause

FINAL Statement

FIND

FINDLOC

FINDFILEQQ

FIRSTPRIVATE

FIXEDFORMLINESIZE

FLOAT

FLOOR

FLUSH Directive

FLUSH Statement

FLUSH Subroutine

FMA and NOFMA

FOR_DESCRIPTOR_ASSIGN

FOR_GET_FPE

FOR_IFCORE_VERSION

FOR_IFPORT_VERSION

FOR_LFENCE

FOR_MFENCE

for_rtl_finish_

for_rtl_init_

FOR_SET_FPE

FOR_SET_FTN_ALLOC

FOR_SET_REENTRANCY

FOR_SFENCE

FORALL

FORMAT

FORM TEAM

FP_CLASS

FPUTC

FRACTION

FREE

FREEFORM and NOFREEFORM

FSEEK

FSTAT

FTELL, FTELLI8

FULLPATHQQ

FUNCTION

GAMMA

GENERIC

GERROR

GETARG

GETC

GETCHARQQ

GET_COMMAND

GET_COMMAND_ARGUMENT

GETCONTROLFPQQ

GETCWD

GETDAT

GETDRIVEDIRQQ

GETDRIVESIZEQQ

GETDRIVESQQ

GETENV

GET_ENVIRONMENT_VARIABLE

GETENVQQ

GETEXCEPTIONPTRSQQ

GETFILEINFOQQ

GETGID

GETLASTERROR

GETLASTERRORQQ

GETLOG

GETPID

GETPOS, GETPOSI8

GETSTATUSFPQQ

GETSTRQQ

GET_TEAM

GETTIM

GETTIMEOFDAY

GETUID

GMTIME

GOTO - Assigned

GOTO - Computed

GOTO - Unconditional

GROUPPRIVATE

H to I

HINT

HOSTNAM

HUGE

HYPOT

IACHAR

IALL

IAND

IANY

IARGC

IBCHNG

IBCLR

IBITS

IBSET

ICHAR

IDATE Intrinsic Procedure

IDATE Portability Routine

IDATE4

IDENT

IDFLOAT

IEEE_CLASS

IEEE_COPY_SIGN

IEEE_FLAGS

IEEE_FMA

IEEE_GET_FLAG

IEEE_GET_HALTING_MODE

IEEE_GET_MODES

IEEE_GET_ROUNDING_MODE

IEEE_GET_STATUS

IEEE_GET_UNDERFLOW_MODE

IEEE_HANDLER

IEEE_INT

IEEE_IS_FINITE

IEEE_IS_NAN

IEEE_IS_NEGATIVE

IEEE_IS_NORMAL

IEEE_LOGB

IEEE_MAX

IEEE_MAX_MAG

IEEE_MAX_NUM

IEEE_MAX_NUM_MAG

IEEE_MIN

IEEE_MIN_MAG

IEEE_MIN_NUM

IEEE_MIN_NUM_MAG

IEEE_NEXT_AFTER

IEEE_NEXT_DOWN

IEEE_NEXT_UP

IEEE_QUIET_EQ

IEEE_QUIET_GE

IEEE_QUIET_GT

IEEE_QUIET_LE

IEEE_QUIET_LT

IEEE_QUIET_NE

IEEE_REAL

IEEE_REM

IEEE_RINT

IEEE_SCALB

IEEE_SELECTED_REAL_KIND

IEEE_SET_FLAG

IEEE_SET_HALTING_MODE

IEEE_SET_MODES

IEEE_SET_ROUNDING_MODE

IEEE_SET_STATUS

IEEE_SET_UNDERFLOW_MODE

IEEE_SIGNALING_EQ

IEEE_SIGNALING_GE

IEEE_SIGNALING_GT

IEEE_SIGNALING_LE

IEEE_SIGNALING_LT

IEEE_SIGNALING_NE

IEEE_SIGNBIT

IEEE_SUPPORT_DATATYPE

IEEE_SUPPORT_DENORMAL

IEEE_SUPPORT_DIVIDE

IEEE_SUPPORT_FLAG

IEEE_SUPPORT_HALTING

IEEE_SUPPORT_INF

IEEE_SUPPORT_IO

IEEE_SUPPORT_NAN

IEEE_SUPPORT_ROUNDING

IEEE_SUPPORT_SQRT

IEEE_SUPPORT_STANDARD

IEEE_SUPPORT_SUBNORMAL

IEEE_SUPPORT_UNDERFLOW_CONTROL

IEEE_UNORDERED

IEEE_VALUE

IEOR

IERRNO

IF - Arithmetic

IF - Logical

IF Clause

IF Construct

IF Directive Construct

IF DEFINED Directive

IFIX

IFLOATI, IFLOATJ

ILEN

IMAGE_INDEX

IMAGE_STATUS

IMPLICIT

IMPORT

IMPURE

IN_REDUCTION

INCLUDE

INDEX

INLINE, FORCEINLINE, and NOINLINE

INMAX

INQUIRE

INTC

INT_PTR_KIND

INTEGER Statement

INTEGER Directive

INTERCHANGE Directive for OpenMP

INTENT

INTERFACE

INTERFACE TO

INTEROP

INTRINSIC

INUM

IPARITY

IRAND, IRANDM

IRANGET

IRANSET

IS_CONTIGUOUS

IS_DEVICE_PTR Clause

IS_IOSTAT_END

IS_IOSTAT_EOR

ISATTY

ISHA

ISHC

ISHFT

ISHFTC

ISHL

ISNAN

ITERATOR Clause Modifier

ITIME

IVDEP

IXOR

J to L

JABS

JDATE

JDATE4

JNUM

KILL

KIND

KNUM

LASTPRIVATE

LBOUND

LCOBOUND

LCWRQQ

LEADZ

LEN_TRIM

LINEAR Clause

LNBLNK

%LOC

LOCK and UNLOCK

LOG_GAMMA

LOG10

LOGICAL Function

LOGICAL Statement

LONG

LOOP

LOOP COUNT

LSHIFT

LSTAT

LTIME

M to N

MAKEDIRQQ

MALLOC

MAP Clause

MAP and END MAP

MASKED

MASKED TASKLOOP

MASKED TASKLOOP SIMD

MASKL

MASKR

MASTER

MASTER TASKLOOP

MASTER TASKLOOP SIMD

MATMUL

MAXEXPONENT

MAXLOC

MAXVAL

MCLOCK

MERGE

MERGE_BITS

MERGEABLE Clause

MESSAGE

METADIRECTIVE

MINEXPONENT

MINLOC

MINVAL

MM_PREFETCH

MODULE

MODULE FUNCTION

MODULE PROCEDURE

MODULE SUBROUTINE

MODULO

MOVE_ALLOC

MVBITS

NAMELIST

NARGS

NEAREST

NEW_LINE

NINT

NOFREEFORM

NOFUSION

NON_RECURSIVE

NOOPTIMIZE

NOPREFETCH

NORM2

NOSTRICT

NOTHING

NOUNROLL

NOUNROLL_AND_JAM

NOVECTOR

NOWAIT Clause

NULL

NULLIFY

NUM_IMAGES

O to P

OBJCOMMENT

OPEN

OPTIONAL

OPTIMIZE and NOOPTIMIZE

OPTIONS Directive

OPTIONS Statement

ORDER Clause

ORDERED

OUT_OF_RANGE

PACK Directive

PACK Function

PACKTIMEQQ

PARALLEL Directive for OpenMP

PARALLEL DO

PARALLEL DO SIMD

PARALLEL LOOP

PARALLEL MASKED

PARALLEL MASKED TASKLOOP

PARALLEL MASKED TASKLOOP SIMD

PARALLEL MASTER

PARALLEL MASTER TASKLOOP

PARALLEL MASTER TASKLOOP SIMD

PARALLEL SECTIONS

PARALLEL WORKSHARE

PARAMETER

PARITY

PAUSE

PEEKCHARQQ

PERROR

POINTER - Fortran

POINTER - Integer

POPCNT

POPPAR

PRECISION

PREFETCH and NOPREFETCH General Directives

PREFETCH DATA Directive for OpenMP

PRESENT

PRIORITY

PRIVATE Clause

PRIVATE Statement

PROCEDURE

PROCESSOR Clause

PRODUCT

PROGRAM

PROTECTED

PSECT

PUBLIC

PURE

PUTC

Q to R

QCMPLX

QEXT

QFLOAT

QNUM

QRANSET

QREAL

QSORT

RADIX

RAISEQQ

RAND, RANDOM

RANDOM Subroutine

RANDOM_INIT

RANDOM_NUMBER

RANDOM_SEED

RANDU

RANF Intrinsic Procedure

RANF Portability Routine

RANGE

RANGET

RANK

RANSET

READ Statement

REAL Directive

REAL Function

REAL Statement

RECORD

RECURSIVE and NON_RECURSIVE

REDUCE

REDUCTION

%REF

RENAME

RENAMEFILEQQ

REPEAT

REQUIRES

RESHAPE

RESULT

RETURN

REWIND

REWRITE

RINDEX

RNUM

RRSPACING

RSHIFT

RUNQQ

SAME_TYPE_AS

SAVE

SCALE

SCAN Directive

SCAN Function

SCANENV

SCOPE

SCWRQQ

SECNDS Intrinsic Procedure

SECNDS Portability Routine

SECTIONS

SEED

SELECT CASE and END SELECT

SELECT RANK

SELECT TYPE

SELECTED_CHAR_KIND

SELECTED_INT_KIND

SELECTED_REAL_KIND

SEQUENCE

SETCONTROLFPQQ

SETDAT

SETENVQQ

SETERRORMODEQQ

SET_EXPONENT

SETFILEACCESSQQ

SETFILETIMEQQ

SETTIM

SHAPE

SHARED Clause

SHIFTA

SHIFTL

SHIFTR

SHORT

SIGN

SIGNAL

SIGNALQQ

SIMD Directive for OpenMP

SIND

SINGLE

SINH

SIZE Function

SIZEOF

SLEEP

SLEEPQQ

SNGL

SORTQQ

SPACING

SPLIT

SPLITPATHQQ

SPREAD

SQRT

SRAND

SSWRQQ

STAT

Statement Function

STATIC

STOP and ERROR STOP

STOPPED_IMAGES

STORAGE_SIZE

STRICT and NOSTRICT

STRUCTURE and END STRUCTURE

SUBDEVICE

SUBMODULE

SUBROUTINE

SYNC ALL

SYNC IMAGES

SYNC MEMORY

SYNC TEAM

SYSTEM

SYSTEM_CLOCK

SYSTEMQQ

T to Z

TAND

TANH

TARGET

TARGET DATA

TARGET Statement

TARGET ENTER DATA

TARGET EXIT DATA

TARGET PARALLEL

TARGET PARALLEL DO

TARGET PARALLEL DO SIMD

TARGET PARALLEL LOOP

TARGET SIMD

TARGET TEAMS

TARGET TEAMS DISTRIBUTE

TARGET TEAMS DISTRIBUTE PARALLEL DO

TARGET TEAMS DISTRIBUTE PARALLEL DO SIMD

TARGET TEAMS DISTRIBUTE SIMD

TARGET TEAMS LOOP

TARGET UPDATE

TASK

TASK_REDUCTION

TASKGROUP

TASKLOOP

TASKLOOP SIMD

TASKWAIT

TASKYIELD

TEAM_NUMBER

TEAMS

TEAMS DISTRIBUTE

TEAMS DISTRIBUTE PARALLEL DO

TEAMS DISTRIBUTE PARALLEL DO SIMD

TEAMS DISTRIBUTE SIMD

TEAMS LOOP

THIS_IMAGE

THREAD_LIMIT

THREADPRIVATE

TILE

TIME Intrinsic Procedure

TIME Portability Routine

TIMEF

TINY

TOKENIZE

TRACEBACKQQ

TRAILZ

TRANSFER

TRANSPOSE

TRIM

TTYNAM

Type Declarations

TYPE Statement for Derived Types

UBOUND

UCOBOUND

UNDEFINE

UNION and END UNION

UNLINK

UNPACK

UNPACKTIMEQQ

UNROLL Directive for OpenMP

UNROLL and NOUNROLL General Directives

UNROLL_AND_JAM and NOUNROLL_AND_JAM

UNTIED Clause

USE_DEVICE_PTR Clause

%VAL

VALUE

VECREMAINDER Clause

VECTOR and NOVECTOR

VERIFY

VIRTUAL

VOLATILE

WAIT

WHERE

WORKDISTRIBUTE

WORKSHARE

WRITE Statement

ZEXT

POSIX* Library Routines

IPXFARGC

IPXFCONST

IPXFLENTRIM

IPXFWEXITSTATUS

IPXFWSTOPSIG

IPXFWTERMSIG

PXFGET

PXFSET

PXFAGET

PXFASET

PXFACCESS

PXFALARM

PXFCALLSUBHANDLE

PXFCFGETISPEED

PXFCFGETOSPEED

PXFCFSETISPEED

PXFCFSETOSPEED

PXFCHDIR

PXFCHMOD

PXFCHOWN

PXFCLEARENV

PXFCLOSE

PXFCLOSEDIR

PXFCONST

PXFCREAT

PXFCTERMID

PXFDUP, PXFDUP2

PXFEGET

PXFESET

PXFEXECV

PXFEXECVE

PXFEXECVP

PXFEXIT, PXFFASTEXIT

PXFFCNTL

PXFFDOPEN

PXFFFLUSH

PXFFGETC

PXFFILENO

PXFFORK

PXFFPATHCONF

PXFFPUTC

PXFFSEEK

PXFFSTAT

PXFFTELL

PXFGETARG

PXFGETC

PXFGETCWD

PXFGETEGID

PXFGETENV

PXFGETEUID

PXFGETGID

PXFGETGRGID

PXFGETGRNAM

PXFGETGROUPS

PXFGETLOGIN

PXFGETPGRP

PXFGETPID

PXFGETPPID

PXFGETPWNAM

PXFGETPWUID

PXFGETSUBHANDLE

PXFGETUID

PXFISATTY

PXFISBLK

PXFISCHR

PXFISCONST

PXFISDIR

PXFISFIFO

PXFISREG

PXFKILL

PXFLINK

PXFLOCALTIME

PXFLSEEK

PXFMKDIR

PXFMKFIFO

PXFOPEN

PXFOPENDIR

PXFPATHCONF

PXFPAUSE

PXFPIPE

PXFPOSIXIO

PXFPUTC

PXFREAD

PXFREADDIR

PXFRENAME

PXFREWINDDIR

PXFRMDIR

PXFSETENV

PXFSETGID

PXFSETPGID

PXFSETSID

PXFSETUID

PXFSIGACTION

PXFSIGADDSET

PXFSIGDELSET

PXFSIGEMPTYSET

PXFSIGFILLSET

PXFSIGISMEMBER

PXFSIGPENDING

PXFSIGPROCMASK

PXFSIGSUSPEND

PXFSLEEP

PXFSTAT

PXFSTRUCTCOPY

PXFSTRUCTCREATE

PXFSTRUCTFREE

PXFSYSCONF

PXFTCDRAIN

PXFTCFLOW

PXFTCFLUSH

PXFTCGETATTR

PXFTCGETPGRP

PXFTCSENDBREAK

PXFTCSETATTR

PXFTCSETPGRP

PXFTIME

PXFTIMES

PXFTTYNAME

PXFUCOMPARE

PXFUMASK

PXFUNAME

PXFUNLINK

PXFUTIME

PXFWAIT

PXFWAITPID

PXFWIFEXITED

PXFWIFSIGNALED

PXFWIFSTOPPED

PXFWRITE

Automation Server and Component Object Model Library Routines

AUTOAddArg

AUTOAllocateInvokeArgs

AUTODeallocateInvokeArgs

AUTOGetExceptInfo

AUTOGetProperty

AUTOGetPropertyByID

AUTOGetPropertyInvokeArgs

AUTOInvoke

AUTOSetProperty

AUTOSetPropertyByID

AUTOSetPropertyInvokeArgs

COMAddObjectReference

COMCLSIDFromProgID

COMCLSIDFromString

COMCreateObject

COMCreateObjectByGUID

COMCreateObjectByProgID

COMGetActiveObjectByGUID

COMGetActiveObjectByProgID

COMGetFileObject

COMInitialize

COMIsEqualGUID

COMQueryInterface

COMReleaseObject

COMStringFromGUID

COMUninitialize

National Language Support Library Routines

MBCharLen

MBConvertMBToUnicode

MBConvertUnicodeToMB

MBCurMax

MBINCHARQQ

MBINDEX

MBJISToJMS, MBJMSToJIS

MBLead

MBLen

MBLen_Trim

MBLGE, MBLGT, MBLLE, MBLLT, MBLEQ, MBLNE

MBNext

MBPrev

MBSCAN

MBStrLead

MBVERIFY

NLSEnumCodepages

NLSEnumLocales

NLSFormatCurrency

NLSFormatDate

NLSFormatNumber

NLSFormatTime

NLSGetEnvironmentCodepage

NLSGetLocale

NLSGetLocaleInfo

NLSSetEnvironmentCodepage

NLSSetLocale

QuickWin Library Routines

ABOUTBOXQQ

APPENDMENUQQ

CLICKMENUQQ

DELETEMENUQQ

FOCUSQQ

GETACTIVEQQ

GETEXITQQ

GETHWNDQQ

GETUNITQQ

GETWINDOWCONFIG

GETWSIZEQQ

INCHARQQ

INITIALSETTINGS

INQFOCUSQQ

INSERTMENUQQ

INTEGERTORGB

MESSAGEBOXQQ

MODIFYMENUFLAGSQQ

MODIFYMENUROUTINEQQ

MODIFYMENUSTRINGQQ

PASSDIRKEYSQQ

REGISTERMOUSEEVENT

RGBTOINTEGER

SETACTIVEQQ

SETEXITQQ

SETMESSAGEQQ

SETMOUSECURSOR

SETWINDOWCONFIG

SETWINDOWMENUQQ

SETWSIZEQQ

UNREGISTERMOUSEEVENT

WAITONMOUSEEVENT

Graphics Library Routines

ARC, ARC_W

CLEARSCREEN

DISPLAYCURSOR

ELLIPSE, ELLIPSE_W

FLOODFILL, FLOODFILL_W

FLOODFILLRGB, FLOODFILLRGB_W

GETARCINFO

GETBKCOLOR

GETBKCOLORRGB

GETCOLOR

GETCOLORRGB

GETCURRENTPOSITION, GETCURRENTPOSITION_W

GETFILLMASK

GETFONTINFO

GETGTEXTEXTENT

GETGTEXTROTATION

GETIMAGE, GETIMAGE_W

GETLINESTYLE

GETLINEWIDTHQQ

GETPHYSCOORD

GETPIXEL, GETPIXEL_W

GETPIXELRGB, GETPIXELRGB_W

GETPIXELS

GETPIXELSRGB

GETTEXTCOLOR

GETTEXTCOLORRGB

GETTEXTPOSITION

GETTEXTWINDOW

GETVIEWCOORD, GETVIEWCOORD_W

GETWINDOWCOORD

GETWRITEMODE

GRSTATUS

IMAGESIZE, IMAGESIZE_W

INITIALIZEFONTS

LINETO, LINETO_W

LINETOAR

LINETOAREX

LOADIMAGE, LOADIMAGE_W

MOVETO, MOVETO_W

OUTGTEXT

OUTTEXT

PIE, PIE_W

POLYBEZIER, POLYBEZIER_W

POLYBEZIERTO, POLYBEZIERTO_W

POLYGON, POLYGON_W

POLYLINEQQ

PUTIMAGE, PUTIMAGE_W

RECTANGLE, RECTANGLE_W

REMAPALLPALETTERGB, REMAPPALETTERGB

SAVEIMAGE, SAVEIMAGE_W

SCROLLTEXTWINDOW

SETBKCOLOR

SETBKCOLORRGB

SETCLIPRGN

SETCOLOR

SETCOLORRGB

SETFILLMASK

SETFONT

SETGTEXTROTATION

SETLINESTYLE

SETLINEWIDTHQQ

SETPIXEL, SETPIXEL_W

SETPIXELRGB, SETPIXELRGB_W

SETPIXELS

SETPIXELSRGB

SETTEXTCOLOR

SETTEXTCOLORRGB

SETTEXTCURSOR

SETTEXTPOSITION

SETTEXTWINDOW

SETVIEWORG

SETVIEWPORT

SETWINDOW

SETWRITEMODE

WRAPON

Serial Port I/O Library Routines

SPORT_CANCEL_IO

SPORT_CONNECT

SPORT_CONNECT_EX

SPORT_GET_HANDLE

SPORT_GET_STATE

SPORT_GET_STATE_EX

SPORT_GET_TIMEOUTS

SPORT_PEEK_DATA

SPORT_PEEK_LINE

SPORT_PURGE

SPORT_READ_DATA

SPORT_READ_LINE

SPORT_RELEASE

SPORT_SET_STATE

SPORT_SET_STATE_EX

SPORT_SET_TIMEOUTS

SPORT_SHOW_STATE

SPORT_SPECIAL_FUNC

SPORT_WRITE_DATA

SPORT_WRITE_LINE

Dialog Library Routines

DLGEXIT

DLGFLUSH

DLGGET, DLGGETINT, DLGGETLOG, DLGGETCHAR

DLGINIT, DLGINITWITHRESOURCEHANDLE

DLGISDLGMESSAGE, DLGISDLGMESSAGEWITHDLG

DLGMODAL, DLGMODALWITHPARENT

DLGMODELESS

DLGSENDCTRLMESSAGE

DLGSET, DLGSETINT, DLGSETLOG, DLGSETCHAR

DLGSETCTRLEVENTHANDLER

DLGSETRETURN

DLGSETSUB

DLGSETTITLE

DLGUNINIT

Glossary

Glossary A

Glossary B

Glossary C

Glossary D

Glossary E

Glossary F

Glossary G

Glossary H

Glossary I

Glossary K

Glossary L

Glossary M

Glossary N

Glossary O

Glossary P

Glossary Q

Glossary R

Glossary S

Glossary T

Glossary U

Glossary V

Glossary W

Glossary Z

Compilation

Supported Environment Variables

Use Other Methods to Set Environment Variables

Files Associated with Intel® Fortran Applications

Compile and Link Multithreaded Programs

Ahead of Time Compilation

Use Configuration Files

Use Response Files

Create Fortran Executables

Link Debug Information

Debugging

Prepare Your Program for Debugging

Use Breakpoints in the Microsoft Debugger

Debug the Squares Example with Microsoft* Debugger

View Fortran Data Types in the Microsoft Debugger

View the Call Stack in the Microsoft Debugger

Locate Unaligned Data

Debug a Program that Encounters a Signal or Exception

Debugging and Optimizations

Debug Mixed-Language Programs

Debug Multithreaded Programs

Use Remote Debugging

Remote Debugging Scenario

Program Structure

Use Module Files

Use Include Files

Advantages of Internal Procedures

Implications for Array Copies

Optimization and Programming

OpenMP* Support

Add OpenMP* Support

Parallel Processing Model

Control Thread Allocation

OpenMP* Library Support

OpenMP* Runtime Library Routines

Intel® Compiler Extension Routines to OpenMP*

OpenMP* Support Libraries

Use the OpenMP* Libraries

Thread Affinity Interface

OpenMP* Memory Spaces and Allocators

OpenMP* Contexts

OpenMP* Context Selectors

Score and Match Context Selectors

OpenMP* Offloading SPMD/SIMT and SIMD Models

OpenMP* Advanced Issues

OpenMP* Implementation-Defined Behaviors

OpenMP* Examples

Compiler Sanitizers

Coarrays

Use Coarrays

Debug a Coarray Application

Vectorization

Automatic Vectorization

Vectorization Programming Guidelines

Use Automatic Vectorization

Vectorization and Loops

Loop Constructs

Explicit Vector Programming

User-Mandated or SIMD Vectorization

Function Annotations and the SIMD Directive for Vectorization

High-Level Optimization

Interprocedural Optimization

Use Interprocedural Optimization

Performance and Large Program Considerations

Inline Expansion of Functions

Fortran Language Extensions

Support for 64-bit Architecture on Linux

Traceback

Traceback Tradeoffs and Restrictions

Sample Programs and Traceback Information

Allocate Common Blocks

Generate Listing and Map Files

Create Shared Libraries

Specify Alternative Tools and Locations

Temporary Files Created by the Compiler or Linker

Use the Intel® Fortran COM Server on Windows

Advantages of a COM Server

COM Server Concepts

Create the Fortran COM Server

Fortran COM Server Interface Design Considerations

Advanced COM Server Topics

Deploy the COM Server on Another System

Use the Intel® Fortran Module Wizard (COM Client) on Windows

COM and Automation Objects

The Role of the Module Wizard

Use the Module Wizard to Generate Code

Call the Routines Generated by the Module Wizard

Get a Pointer to an Object's Interface

Additional Resources about COM and Automation

IFPORT Portability Library

fpp Preprocessing

fpp Preprocessor Directives

Predefined Preprocessor Symbols

Fortran Preprocessor Options

Methods to Optimize Code Size

Optimization Reports

National Language Support Routines

Compatibility and Portability

Fortran Language Standards

Conformance, Compatibility, and Fortran Features

Minimize Operating System-Specific Information

Store and Represent Data

Data Portability

Format Data for Transportability

Supported Native and Non-Native Numeric Formats

Port Non-Native Data

Specify the Data Format

Notices and Disclaimers

Samples

DIM

Elemental Intrinsic Function (Generic): Returns the difference between two numbers (if the difference is positive).

result = DIM (x, y)

x	(Input) Must be of type integer or real.
y	(Input) Must have the same type and kind parameters as x.

Results

The result type and kind are the same as x. The value of the result is x- y if x is greater than y; otherwise, the value of the result is zero.

The setting of compiler options specifying integer size can affect this function.

Specific Name	Argument type	Result Type
BDIM	INTEGER(1)	INTEGER(1)
IIDIM¹	INTEGER(2)	INTEGER(2)
IDIM ²	INTEGER(4)	INTEGER(4)
KIDIM	INTEGER(8)	INTEGER(8)
DIM	REAL(4)	REAL(4)
DDIM	REAL(8)	REAL(8)
QDIM	REAL(16)	REAL(16)
¹Or HDIM. ²Or JIDIM. For compatibility, IDIM can also be specified as a generic function for integer types.

Example

DIM (6, 2) has the value 4.

DIM (-4.0, 3.0) has the value 0.0.

The following shows another example:

  INTEGER i
  REAL r
  REAL(8) d
  i = IDIM(10, 5)            ! returns 5
  r = DIM (-5.1, 3.7)        ! returns 0.0
  d = DDIM (10.0D0, -5.0D0)  ! returns 15.0D0

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