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Manual Reference Pages  - parity (3)

NAME
parity(3f) - [FORTRAN:INTRINSIC:TRANSFORMATIONAL FUNCTION] Reduction with exclusive OR()

SYNTAX
result = parity(mask[, dim])

DESCRIPTION
Calculates the parity (i.e. the reduction using .xor.) of MASK along dimension DIM.

ARGUMENTS
MASK Shall be an array of type LOGICAL.
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.

RETURN VALUE
The result is of the same type as MASK.

If DIM is absent, a scalar with the parity of all elements in MASK is returned: .true. if an odd number of elements are .true. and where "n" equals the rank of MASK, and a shape similar to that of MASK with dimension DIM dropped is returned.

EXAMPLE
Sample program: 

   program demo_parity
   implicit none
     logical :: x(2) = [ .true., .false. ]
     print *, parity(x) ! T
   end program demo_parity

STANDARD
[[Fortran 2008]] and later

CLASS
Transformational function

parity (3) March 11, 2021
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