Open Watcom FORTRAN 77 Language Reference

Language Reference
2.18 DEALLOCATE Statement
DEALLOCATE (arraylist [, STAT = ierr])
where:
arraylist
ierr
is a list of allocatable array names separated by commas.
is an integer variable that returns the status of the attempted deallocation.
Allocatable arrays may be dynamically allocated and deallocated at execution time. An array must have
been declared allocatable by specifying its dimensions using colons only. No array bounds are specified.
Example:
DIMENSION A(:), B(:,:)
In the above example, A is declared to be a one-dimensional allocatable array and B is declared to be a
two-dimensional allocatable array.
The DEALLOCATE statement frees up any memory allocated for the specified array(s). It then
disassociates the specified array(s) from the memory to which it was associated. The deallocation does not
necessarily succeed. For example, an attempt to deallocate an array that was not previously allocated will
cause an error.
Example:
DIMENSION A(:), B(:,:)
.
.
.
ALLOCATE( A(N), B(0:4,5) )
.
.
.
DEALLOCATE( A )
More than one allocatable array may appear in an DEALLOCATE statement, separated by commas.
Example:
DIMENSION A(:), B(:,:)
.
.
.
ALLOCATE( A(N), B(0:4,5) )
.
.
.
DEALLOCATE( A, B )
If the deallocation fails and the STAT= specifier was not used, an execution-time error occurs. If the
STAT= specifier is used, the specified variable returns a zero value if the deallocation succeeded, and a
non-zero value if the deallocation failed.
42 DEALLOCATE Statement