NAME

_toupper - transliterate lower-case characters to upper-case

 SYNOPSIS

#include <ctype.h>

int _toupper(int c);

 DESCRIPTION

The _toupper() macro is equivalent to toupper() except that the argument c must be a lower-case letter.

 RETURN VALUE

On successful completion, _toupper() returns the upper-case letter corresponding to the argument passed.

 ERRORS

No errors are defined.

 EXAMPLES

None.

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

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

DERIVATION

Derived from Issue 1 of the SVID.