TOUPPER(3)                OpenBSD Programmer's Manual               TOUPPER(3)

NAME
     toupper, _toupper - lower case to upper case letter conversion



SYNOPSIS
     #include <ctype.h>

     int
     toupper(int c);

     int
     _toupper(int c);

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

RETURN VALUES
     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 upper-case letter is
     returned; otherwise the output is undefined.

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

OpenBSD 2.6                     August 15, 1997                              1