Fortran Wiki
allocated (Rev #4, changes)

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Description

allocated(array) checks the status of whether x is allocated.

Standard

Fortran 95 and later

Class

Inquiry function

Syntax

result = allocated(array)

Arguments

array - the argument shall be an allocatable array.

Return value

The return value is a scalar logical with the default logical kind type parameter. If array is allocated, allocated(array) 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

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Fortran Wiki allocated (Rev #4, changes)