NAME
    toupper		- convert to upper case

SYNTAX
    #include <ctype.h>

    int toupper( c )
      int c;

    int _toupper( c )
      int c;

DESCRIPTION
    These routines convert lower case ASCII characters
    into upper case characters. Toupper(3) may be called
    with any ASCII value from 0 to 127, if <c> is not a
    lower case character then it is returned unchanged.

    _toupper(3) is a macro which can only be used if <c>
    is a lower case character.

RESULTS
    Argument converted to upper case.

SEE ALSO
    ctype(3), toascii(3), tolower(3)