9.158. LEADZ
9.158 LEADZ — Number of leading zero bits of an integer
- Description:
-
LEADZ
returns the number of leading zero bits of an integer. - Standard:
- Fortran 2008 and later
- Class:
- Elemental function
- Syntax:
-
RESULT = LEADZ(I)
- Arguments:
-
I Shall be of type INTEGER
. - Return value:
- The type of the return value is the default
INTEGER
. If all the bits ofI
are zero, the result value isBIT_SIZE(I)
. - Example:
-
PROGRAM test_leadz WRITE (*,*) BIT_SIZE(1) ! prints 32 WRITE (*,*) LEADZ(1) ! prints 31 END PROGRAM
- See also:
- BIT_SIZE,