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 ALSOisalnum(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").
MirOS BSD #10-current August 15, 1997 1