(in string or regular expression literals, or in identifier names) on
ASCII-based machines or to recognize UTF-EBCDIC on EBCDIC-based
machines. B<These are the only times when an explicit C<use utf8>
-is needed.>
+is needed.> See L<utf8>.
You can also use the C<encoding> pragma to change the default encoding
of the data in your script; see L<encoding>.