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

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

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

STANDARDS
     The toupper() function conforms to	ISO/IEC	9899:1990 ("ISO	C90").

BSD				October	3, 2002				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | COMPATIBILITY | SEE ALSO | STANDARDS

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