LEADZ — Number of leading zero bits of an integer#
-
LEADZ(I)#
LEADZ
returns the number of leading zero bits of an integer.- Parameters
I – Shall be of type
INTEGER
.- Returns
The type of the return value is the default
INTEGER
. If all the bits ofI
are zero, the result value isBIT_SIZE(I)
.
- Standard:
Fortran 2008 and later
- Class:
Elemental function
- Syntax:
RESULT = LEADZ(I)
- Example:
PROGRAM test_leadz WRITE (*,*) BIT_SIZE(1) ! prints 32 WRITE (*,*) LEADZ(1) ! prints 31 END PROGRAM
- See also:
BIT_SIZE — Bit size inquiry function, TRAILZ — Number of trailing zero bits of an integer, POPCNT — Number of bits set, POPPAR — Parity of the number of bits set