Implementation status: to be implemented

Synopsis

#include <ctype.h>

int _tolower(int c);

Description

The _tolower() macro is equivalent to tolower(c) except that the application ensures that the argument c is an uppercase letter.

Arguments:
c - a letter to be transliterate to lowercase.

Return value

Upon successful completion, _tolower() returns the lowercase letter corresponding to the argument passed.

Errors

No errors are defined.

Comments

Applications should use the tolower() function instead of the obsolescent _tolower() function.
The _tolower() function may be removed in a future version.