6.14 ALLOCATED — Status of an allocatable entity

Description:

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

Standard:

F95 and later

Class:

Inquiry function

Syntax:

RESULT = 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 .FALSE.

Example:

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