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.\" Copyright, the authors of the Linux man-pages project
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.TH index 3 2025-05-17 "Linux man-pages (unreleased)"
.SH NAME
index, rindex \- locate character in string
.SH LIBRARY
Standard C library
.RI ( libc ,\~ \-lc )
.SH SYNOPSIS
.nf
.B #include <strings.h>
.P
.BI "[[deprecated]] char *index(const char *" s ", int " c );
.BI "[[deprecated]] char *rindex(const char *" s ", int " c );
.fi
.SH DESCRIPTION
.BR index ()
is identical to
.BR strchr (3).
.P
.BR rindex ()
is identical to
.BR strrchr (3).
.P
Use
.BR strchr (3)
and
.BR strrchr (3)
instead of these functions.
.SH STANDARDS
None.
.SH HISTORY
4.3BSD; marked as LEGACY in POSIX.1-2001.
Removed in POSIX.1-2008,
recommending
.BR strchr (3)
and
.BR strrchr (3)
instead.
.SH SEE ALSO
.BR strchr (3),
.BR strrchr (3)
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