__ctype_toupper

Name

__ctype_toupper -- convert lowercase letter to uppercase letter

Synopsis

#include <ctype.h>

int __ctype_toupper(int c);

Description

The __ctype_toupper() function converts a lowercase letter to the corresponding uppercase letter. If the argument is a lowercase letter, the __ctype_toupper() function returns the corresponding uppercase letter if there is one; otherwise, the argument is returned unchanged.

__ctype_toupper is not in the source standard; it is only in the binary standard.