POPCNT — Number of bits set#
-
POPCNT(I)#
POPCNT(I)
returns the number of bits set (‘1’ bits) in the binary representation ofI
.- Parameters
I – Shall be of type
INTEGER
.- Returns
The return value is of type
INTEGER
and of the default integer kind.
- Standard:
Fortran 2008 and later
- Class:
Elemental function
- Syntax:
RESULT = POPCNT(I)
- 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:
POPPAR — Parity of the number of bits set, LEADZ — Number of leading zero bits of an integer, TRAILZ — Number of trailing zero bits of an integer