NAME    [Toc]    [Back]

     toupper -- lower case to upper case letter conversion

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     toupper(int c);

DESCRIPTION    [Toc]    [Back]

     The toupper() function converts a lower-case letter to the corresponding
     upper-case letter.  For single C chars locales (see multibyte(3)) the
     value of the argument is representable as an unsigned char or the value
     of EOF.

RETURN VALUES    [Toc]    [Back]

     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.

COMPATIBILITY    [Toc]    [Back]

     Although toupper() accepts arguments outside of the range of the unsigned
     char type in locales with large character sets, this is a 4.4BSD extension
 and the towupper() function should be used instead for maximum
     portability.

SEE ALSO    [Toc]    [Back]

     ctype(3), isupper(3), multibyte(3), towupper(3)

STANDARDS    [Toc]    [Back]

     The toupper() function conforms to ISO/IEC 9899:1990 (``ISO C89'').


FreeBSD 5.2.1			October 3, 2002 		 FreeBSD 5.2.1