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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'').

FreeBSD 5.4			October 3, 2002 		   FreeBSD 5.4

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