use strict;
use warnings;
use Data::Dumper;

# $\ - output record separator
%\ = ( 1 => 2);
@\ = ( 1, 2 );
print Dumper \%\, \@\;;

# $@ - eval error
%@ = ( 3 => 4);
@@ = ( 3, 4 );
print Dumper \%@, \@@;