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index(3)                 BSD Library Functions Manual                 index(3)


NAME

     index, rindex -- locate character in string


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <strings.h>

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

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


DESCRIPTION

     The index() function locates the first occurrence of c (converted to a
     char) in the string pointed to by s.  The terminating null character is
     considered to be part of the string; therefore, if c is `\0', the func-
     tions locate the terminating `\0'.

     The rindex() function is identical to index(), except that it locates the
     last occurrence of c.


RETURN VALUES

     The functions index() and rindex() return a pointer to the located char-
     acter, or NULL if the character does not appear in the string.


SEE ALSO

     memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3),
     strspn(3), strstr(3), strtok(3)


HISTORY

     The index() and rindex() functions appeared in Version 6 AT&T UNIX.
     Their prototypes existed previously in <string.h> before they were moved
     to <strings.h> for IEEE Std 1003.1-2001 (``POSIX.1'') compliance.

BSD                              June 4, 1993                              BSD

Mac OS X 10.8 - Generated Tue Aug 28 05:49:43 CDT 2012
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