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Manual Reference Pages  - parity (3)

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NAME

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

CONTENTS

Syntax
Description
Arguments
Return Value
Example
Standard
Class

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
     logical :: x(2) = [ .true., .false. ]
     print *, parity(x) ! T
   end program demo_parity

STANDARD

[[Fortran 2008]] and later

CLASS

Transformational function

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parity (3)

March 18, 2019

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