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TOUPPER
!!!TOUPPER
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
CONFORMING TO
BUGS
SEE ALSO
----
!!NAME


toupper, tolower - convert letter to upper or lower case
!!SYNOPSIS


__#include
__ ''c''__);
int tolower (int__ ''c''__);
__
!!DESCRIPTION


__toupper()__ converts the letter ''c'' to upper case,
if possible.


__tolower()__ converts the letter ''c'' to lower case,
if possible.


If ''c'' is not an unsigned char value, or EOF, the
behaviour of these functions is undefined.
!!RETURN VALUE


The value returned is that of the converted letter, or
''c'' if the conversion was not possible.
!!CONFORMING TO


ANSI C, BSD 4.3
!!BUGS


The details of what constitutes an uppercase or lowercase
letter depend on the current locale. For example, the
default ____ locale does not know about
umlauts, so no conversion is done for them.


In some non - English locales, there are lowercase letters
with no corresponding uppercase equivalent; the German sharp
s is one example.
!!SEE ALSO


isalpha(3), setlocale(3),
locale(7)
----

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Last edited on Tuesday, June 4, 2002 12:24:39 am by "perry"

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