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/GNU Fortran 7

9.270 TRAILZ — Number of trailing zero bits of an integer

Description:

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

Standard:

Fortran 2008 and later

Class:

Elemental function

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
See also:

BIT_SIZE, LEADZ, POPPAR, POPCNT

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.1.0/gfortran/TRAILZ.html