index (3) - Linux Manuals

index: locate character in string

Command to display index manual in Linux: $ man 3 index

NAME

index, rindex - locate character in string

SYNOPSIS

#include <strings.h>

char *index(const char *s, int c);

char *rindex(const char *s, int c);

DESCRIPTION

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 ('\0') is considered to be a part of the strings.

RETURN VALUE

The index() and rindex() functions return a pointer to the matched character or NULL if the character is not found.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
index(), rindex()	Thread safety	MT-Safe

CONFORMING TO

4.3BSD; marked as LEGACY in POSIX.1-2001. POSIX.1-2008 removes the specifications of index() and rindex(), recommending strchr(3) and strrchr(3) instead.

COLOPHON

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