# PARALLEL LOOP

OpenMP* Fortran Compiler Directive: Specifies a shortcut for indicating that a loop or loop nest can execute concurrently across multiple threads. This feature is only available for ifx.

## Syntax

!$OMP PARALLEL LOOP [clause[[,] clause]... ]

do-loop

[!$OMP END PARALLEL LOOP]

clause | Can be any of the clauses accepted by the PARALLEL or LOOP directives with identical meanings and restrictions.
do-loop | Is a DO loop that may contain other nested DO loops. The DO loops must all be in canonical form. The DO loop iteration variable must be of type integer.

This combined directive is semantically equivalent to a LOOP construct that immediately follows a PARALLEL directive. All restrictions for PARALLEL and LOOP constructs apply to this combined construct.

If used, the END PARALLEL LOOP directive must appear immediately after the end of the loop. If you do not specify an END PARALLEL LOOP directive, an END PARALLEL LOOP directive is assumed at the end of the do-loop.

Parent topic: O to P

## See Also

OpenMP Fortran Compiler Directives
Syntax Rules for Compiler Directives
PARALLEL construct
LOOP construct