_TOLOWER(3) Library Functions Manual _TOLOWER(3)

_tolower — transliterate uppercase characters to lowercase


#include <ctype.h>

int _tolower(int c);

The _tolower () macro shall be equivalent to ( c) except that the application shall ensure that the argument c is an uppercase letter.

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

No errors are defined.

None.

None.

None.

None.

tolower(3) , isupper(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), xbd_chap07(7), <ctype.h>

First released in Issue 1. Derived from Issue 1 of the SVID.

The DESCRIPTION is updated to avoid use of the term "must" for application requirements.

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December 6, 2001 posix.fail