Manpage of TOLOWER
TOLOWER
Section: NEWLIB (3)
Updated: 2005 Feb 23
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NAME
2.13 `tolower'--translate characters to lower case
SYNOPSIS
#include <ctype.h>
int tolower(int C);
int _tolower(int C);
DESCRIPTION
`tolower' is a macro which converts upper-case characters to lower
case, leaving all other characters unchanged. It is only defined when
C is an integer in the range `EOF' to `255'.
You can use a compiled subroutine instead of the macro definition by
undefining this macro using ``#undef tolower''.
`_tolower' performs the same conversion as `tolower', but should
only be used when C is known to be an uppercase character (`A'-`Z').
RETURNS
`tolower' returns the lower-case equivalent of C when it is a character
between `A' and `Z', and C otherwise.
`_tolower' returns the lower-case equivalent of C when it is a
character between `A' and `Z'. If C is not one of these characters,
the behaviour of `_tolower' is undefined.
PORTABILITY
`tolower' is ANSI C. `_tolower' is not recommended for portable
programs.
No supporting OS subroutines are required.
SEE ALSO
tolower
is part of the
libc
library.
The full documentation for
libc
is maintained as a Texinfo manual. If
info
and
libc
are properly installed at your site, the command
-
info libc
will give you access to the complete manual.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURNS
-
- PORTABILITY
-
- SEE ALSO
-
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