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POPCNT — Number of bits setPOPCNT(I) returns the number of bits set (’1’ bits) in the binary
representation of I.
Fortran 2008 and later
Elemental function
RESULT = POPCNT(I)
| I | Shall be of type INTEGER. |
The return value is of type INTEGER and of the default integer
kind.
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