NAME    [Toc]    [Back]

     toupper, _toupper - lower case to upper case letter  conversion

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     toupper(int c);

     int
     _toupper(int c);

DESCRIPTION    [Toc]    [Back]

     The  toupper()  function converts a lower-case letter to the
corresponding
     upper-case letter.  The _toupper() function is identical  to
toupper() except
 that c must be a lower-case letter.

RETURN VALUES    [Toc]    [Back]

     If  the  argument  to the toupper() function is a lower-case
letter, the
     corresponding upper-case letter is returned if there is one;
otherwise
     the  argument is returned unchanged.  If the argument to the
_toupper()
     function is a lower-case letter,  the  corresponding  uppercase letter is
     returned; otherwise the output is undefined.

SEE ALSO    [Toc]    [Back]

     isalnum(3),  isalpha(3), isascii(3), isblank(3), iscntrl(3),
isdigit(3),
     isgraph(3), islower(3), isprint(3), ispunct(3),  isspace(3),
isupper(3),
     isxdigit(3), stdio(3), toascii(3), tolower(3), ascii(7)

STANDARDS    [Toc]    [Back]

     The  toupper() function conforms to ANSI X3.159-1989 (``ANSI
C'').

OpenBSD     3.6                         August      15,      1997