FFS Section: Linux Programmer's Manual (3) Updated: April 13, 2025 Index   NAME ffs - find first bit set in a word   SYNOPSIS #include <string.h> int ffs(int i);   DESCRIPTION The ffs() function returns the position of the first bit set in the word i. The least significant bit is position 1 and the most significant position 32.   RETURN VALUE The ffs() function returns the position of the first bit set, or NULL if no bits are set.   CONFORMING TO BSD 4.3   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE CONFORMING TO This document was created by using the manual pages. Time: 11:58:03 GMT, March 24, 2025