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LETTERislowerULETTER Tests for lower-case characters.

Overview
#include <ctype.h>

b = islower(ch);

int ch;

Portability
ANSI

Description
This function if the character passed is a lower-case letter. For portability reasons this includes the characters from 'a' to 'z' but not eg. the german Umlauts (äöüß).

Returns
0 if it is no lower-case character, a value <>0 otherwise.

See also