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LETTERisupperULETTER Tests for upper-case characters.

Overview
#include <ctype.h>

b = isupper(ch);

int ch;

Portability
ANSI

Description
This function tests if the character passed is an upper-case letter. For portability reasons this does not include the german Umlauts (äöüß) etc.

Returns
0 if is an upper-case letter, a value <>0 otherwise.

See also