NAME

tolower - transliterate upper-case characters to lower-case

 SYNOPSIS

#include <ctype.h>

int tolower(int c);

 DESCRIPTION

The tolower() function has as a domain a type int, the value of which is representable as an unsigned char or the value of EOF. If the argument has any other value, the behaviour is undefined. If the argument of tolower() represents an upper-case letter, and there exists a corresponding lower-case letter (as defined by character type information in the program locale category LC_CTYPE), the result is the corresponding lower-case letter. All other arguments in the domain are returned unchanged.

 RETURN VALUE

On successful completion, tolower() returns the lower-case letter corresponding to the argument passed; otherwise it returns the argument unchanged.

 ERRORS

No errors are defined.

 EXAMPLES

None.

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

setlocale(), <ctype.h>, the XBD specification, Locale .

DERIVATION

Derived from Issue 1 of the SVID.