index(3) Library Functions Manual index(3) NAME index, rindex - locate character in string LIBRARY Standard C library (libc, -lc) SYNOPSIS #include [[deprecated]] char *index(const char *s, int c); [[deprecated]] char *rindex(const char *s, int c); DESCRIPTION index() is identical to strchr(3). rindex() is identical to strrchr(3). Use strchr(3) and strrchr(3) instead of these functions. STANDARDS None. HISTORY 4.3BSD; marked as LEGACY in POSIX.1-2001. Removed in POSIX.1-2008, recommending strchr(3) and strrchr(3) instead. SEE ALSO strchr(3), strrchr(3) Linux man-pages 6.7 2023-10-31 index(3)