8.12 ALLOCATED — Status of an allocatable entity

Description:

ALLOCATED(X) checks the status of whether X is allocated.

Option:

f95, gnu

Class:

inquiry function

Syntax:

L = ALLOCATED(X)

Arguments:

X	The argument shall be an ALLOCATABLE array.

Return value:

The return value is a scalar LOGICAL with the default logical kind type parameter. If X is allocated, ALLOCATED(X) is .TRUE.; otherwise, it returns the .TRUE.

Example:

          program test_allocated
            integer :: i = 4
            real(4), allocatable :: x(:)
            if (allocated(x) .eqv. .false.) allocate(x(i)
          end program test_allocated