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8.258 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