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/GNU Fortran 7

9.152 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

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gfortran/IPARITY.html