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8.142 IPARITY — Bitwise XOR of array elements

Description:
Reduces with bitwise XOR (exclusive or) the elements of ARRAY along dimension DIM if the corresponding element in MASK is TRUE.
Standard:
Fortran 2008 and later
Class:
Transformational function
Syntax:

RESULT = IPARITY(ARRAY[, MASK])
RESULT = IPARITY(ARRAY, DIM[, MASK])

Arguments:

ARRAY Shall be an array of type INTEGER
DIM (Optional) shall be a scalar of type INTEGER with a value in the range from 1 to n, where n equals the rank of ARRAY.
MASK (Optional) shall be of type LOGICAL and either be a scalar or an array of the same shape as ARRAY.

Return value:
The result is of the same type as ARRAY.

If DIM is absent, a scalar with the bitwise XOR of all elements in ARRAY is returned. Otherwise, an array of rank n-1, where n equals the rank of ARRAY, and a shape similar to that of ARRAY with dimension DIM dropped is returned.

Example:
          PROGRAM test_iparity
            INTEGER(1) :: a(2)
          
            a(1) = b'00100100'
            a(2) = b'01101010'
          
            ! prints 01001110
            PRINT '(b8.8)', IPARITY(a)
          END PROGRAM

See also:
IANY, IALL, IEOR, PARITY