NAME

ffs - find first bit set in a bit string

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS



int ffs(int value)

DESCRIPTION

The ffs() function finds the first bit set in value and returns the index of that bit. Bits are numbered starting from 1, starting at the right-most bit. A return value of 0 means that the argument was zero.

SEE ALSO

bitstring(3)

HISTORY

The ffs() function appeared in 4.3BSD.