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index(3) — Linux manual page

index(3)                 Library Functions Manualindex(3)

NAME        top

       index, rindex - locate character in string

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <strings.h>[[deprecated]] char *index(const char *s, intc);[[deprecated]] char *rindex(const char *s, intc);

DESCRIPTION        top

index() is identical tostrchr(3).rindex() is identical tostrrchr(3).       Usestrchr(3) andstrrchr(3) instead of these functions.

STANDARDS        top

       None.

HISTORY        top

       4.3BSD; marked as LEGACY in POSIX.1-2001.  Removed in       POSIX.1-2008, recommendingstrchr(3) andstrrchr(3) instead.

SEE ALSO        top

strchr(3),strrchr(3)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17index(3)

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