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LETTERtolowerULETTER
Converts uppercase to lowercase letters.
Overview
#include <ctype.h>
r = tolower(ch);
int r;
int ch;
Portability
ANSI
Description
If the character passed is an uppercase letter it will be converted to
lowercase, otherwise it remains unchanged. For portability reasons only the
ASCII letters from "A" to "Z" will be converted, eg. the German Umlauts (äöüß)
remain unchanged.
Returns
The converted character.
See also
toupper