=over =item lc EXPR X<lc> X<lowercase> =item lc Returns a lowercased version of EXPR. This is the internal function implementing the C<\L> escape in double-quoted strings. Respects current LC_CTYPE locale if C<use locale> in force. See L<perllocale> and L<perlunicode> for more details about locale and Unicode support. If EXPR is omitted, uses C<$_>. =back