# double-size

Specifies the default KIND for DOUBLE PRECISION and DOUBLE COMPLEX declarations, constants, functions, and intrinsics.

## Syntax

Linux: | -double-size size

macOS: | -double-size size

Windows: | /double-size:size

## Arguments

size | Specifies the default KIND for DOUBLE PRECISION and DOUBLE COMPLEX declarations, constants, functions, and intrinsics. Possible values are: 64 (KIND=8) or 128 (KIND=16).

## Default

64 | DOUBLE PRECISION variables are defined as REAL*8 and DOUBLE COMPLEX variables are defined as COMPLEX*16.

## Description

This option defines the default KIND for DOUBLE PRECISION and DOUBLE COMPLEX declarations, constants, functions, and intrinsics.

Option | Description
--- | ---
double-size 64 | Defines DOUBLE PRECISION declarations, constants, functions, and intrinsics as REAL(KIND=8) (REAL*8) and defines DOUBLE COMPLEX declarations, functions, and intrinsics as COMPLEX(KIND=8) (COMPLEX*16).
double-size 128 | Defines DOUBLE PRECISION declarations, constants, functions, and intrinsics as REAL(KIND=16) (REAL*16) and defines DOUBLE COMPLEX declarations, functions, and intrinsics as COMPLEX(KIND=16) (COMPLEX*32).

The real-size option overrides the double-size option; for example, on Linux* systems, "-double-size 64 -real-size 128" acts like "-double-size 128 -real-size 128".

## IDE Equivalent

Visual Studio: Data > Default Double Precision KIND

## Alternate Options

None

Parent topic: Data Options