index (3) Linux Manual Page

ByLinux Manual Posted onApr 24, 2026May 20, 2026 Updated onMay 20, 2026

NAME

index, rindex – locate character in string


#include <strings.h>
char *index(const char *s, int c);
char *rindex(const char *s, int c);

The index() function returns a pointer to the first occurrence of the character c in the string s.

The rindex() function returns a pointer to the last occurrence of the character c in the string s.

The terminating null byte (‘