'\" te
.\"  Copyright (c) 1996, Sun Microsystems, Inc.  All Rights Reserved
.TH _tolower 3C "24 Jul 2002" "SunOS 5.11" "Standard C Library Functions"
.SH NAME
_tolower \- transliterate upper-case characters to lower-case
.SH SYNOPSIS
.LP
.nf
#include <ctype.h> 

\fBint\fR \fB_tolower\fR(\fBint\fR \fIc\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fB_tolower()\fR macro is equivalent to \fBtolower\fR(3C) except that the argument \fIc\fR must be an upper-case letter.
.SH RETURN VALUES
.sp
.LP
On successful completion, \fB_tolower()\fR returns the lower-case letter corresponding to the argument passed.
.SH ERRORS
.sp
.LP
No errors are defined.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
lw(2.75i) |lw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
\fBATTRIBUTE TYPE\fR\fBATTRIBUTE VALUE\fR
_
CSIEnabled
_
Interface StabilityStandard
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBisupper\fR(3C), \fBtolower\fR(3C), \fBattributes\fR(5), \fBstandards\fR(5)