toupper.c File Reference

#include "../ctype.h"

Functions
int	toupper (int c)
	Make letter upper. More...

Function Documentation

toupper()

int toupper

(

int

c

)

Make letter upper.

The toupper function converts a lowercase letter to a corresponding uppercase letter.

Parameters

c	Value to check.

Returns

If the argument is a character for which islower is true and there are one or more corresponding characters, as specified by the current locale, for which isupper is true, the toupper function returns one of the corresponding characters (always the same one for any giv en locale); otherwise, the argument is returned unchanged.