The ALLOCATE statement dynamically creates storage for allocatable arrays and pointer targets. The storage space allocated is uninitialized.
The ALLOCATE statement takes the following form:
Rules and Behavior
A bound in s-spec must not be an expression containing an array inquiry function whose argument is any allocatable object in the same ALLOCATE statement; for example, the following is not permitted:
INTEGER ERR INTEGER, ALLOCATABLE :: A(:), B(:) ... ALLOCATE(A(10:25), B(SIZE(A)), STAT=ERR) ! A is invalid as an argument ! to function SIZE
If a STAT variable is specified, it must not be allocated in the ALLOCATE statement in which it appears. If the allocation is successful, the variable is set to zero. If the allocation is not successful, an error condition occurs, and the variable is set to a positive integer value (representing the run-time error). If no STAT variable is specified and an error condition occurs, program execution terminates.
The following is an example of the ALLOCATE statement:
INTEGER J, N, ALLOC_ERR REAL, ALLOCATABLE :: A(:), B(:,:) ... ALLOCATE(A(0:80), B(-3:J+1, N), STAT = ALLOC_ERR)
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