.TH _tolower() "" "" "ctype Function (libc)"
.PC "Convert characters to lower case"
\fB#include <ctype.h>\fR
\fBint _tolower(\fIc\^\fB) int \fIc\^\fB;\fR
.PP
The function
.B _tolower()
converts the character
.I c
to lower case, and returns the converted character.
Unlike the related function
.BR tolower() ,
.B _tolower()
is not guaranteed to work correctly if handed anything other than an
upper-case character, that is, a character for which \fBisupper()\fR
returns true.
.SH "See Also"
.Xr "_toupper()," _5Ftouppe
.Xr "libc," libc
.Xr "tolower()" tolower
.SH Notes
.B _tolower()
is not part of the ANSI standard; \*(CO includes it only to support old code.
You should use
.BR tolower()
instead.
