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LETTERisgraphULETTER Tests for graphic characters.

Overview
#include <ctype.h>

b = isgraph(ch);

int ch;

Portability
ANSI

Description
This function tests if the character passed is a visible one. This includes all characters rendering something on the screen, but not the Whitespace (ASCII code 32).

Returns
0 if the character is not visible, otherwise a value <>0.

See also