netbsd man page for toupper

TOUPPER(3)						   BSD Library Functions Manual 						TOUPPER(3)

NAME
     toupper -- lower case to upper case letter conversion

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     toupper(int c);

DESCRIPTION
     The toupper() function converts a lower-case letter to the corresponding upper-case letter.

RETURN VALUES
     If the argument is a lower-case letter, the toupper() function returns the corresponding upper-case letter if there is one; otherwise the
     argument is returned unchanged.

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

STANDARDS
     The toupper() function conforms to ANSI X3.159-1989 (``ANSI C89'').

CAVEATS
     The argument to toupper() must be EOF or representable as an unsigned char; otherwise, the behavior is undefined.	See the CAVEATS section of
     ctype(3) for more details.

BSD
								  April 17, 2008							       BSD