TRAILZ — Number of trailing zero bits of an integer

Description

TRAILZ returns the number of trailing zero bits of an integer.

Syntax

RESULT = TRAILZ(I)

Arguments

I Shall be of type INTEGER.

Return value

The type of the return value is the default INTEGER. If all the bits of I are zero, the result value is BIT_SIZE(I).

Example


PROGRAM test_trailz
  WRITE (*,*) TRAILZ(8) ! prints 3
END PROGRAM

Standard

Fortran 2008 and later

Class

Elemental function

See also

BIT_SIZE, LEADZ, POPPAR, POPCNT