toupper
- lower case to upper case letter conversion
LIBRARY
Lb libc
SYNOPSIS
#include <ctype.h> int
toupper (int c);
DESCRIPTION
The
toupper ();
function converts a lower-case letter to the corresponding
upper-case letter.
The argument must be representable as an
Vt unsigned char
or the value of
EOF
RETURN VALUES
If the argument is a lower-case letter, the
toupper ();
function returns the corresponding upper-case letter if there is
one; otherwise the argument is returned unchanged.
COMPATIBILITY
The
BSD 4.4
extension of accepting arguments outside of the range of the
Vt unsigned char
type in locales with large character sets is considered obsolete
and may not be supported in future releases.
The
towupper ();
function should be used instead.
