MirBSD manpage: toupper(3), _toupper(3)

TOUPPER(3)                 BSD 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 C89").

MirBSD #10-current             August 15, 1997                               1