# Fortran Wiki poppar

## Description

Returns the parity of an integer’s binary representation (i.e., the parity of the number of bits set).

## Standard

Fortran 2008 and later

## Class

Elemental function

## Syntax

result = poppar(i)

## Arguments

• i - Shall be of type integer.

## Return value

The return value is of type ‘integer’ and of the default integer kind. It is equal to 0 if i has an even number of bits set and 1 if an odd number of bits are set.

## Example

program test_population
print *, popcnt(127),       poppar(127)
print *, popcnt(huge(0_4)), poppar(huge(0_4))
print *, popcnt(huge(0_8)), poppar(huge(0_8))
end program test_population

## See Also

category: intrinsics