$test = 7; #(OK only when $test is 7,5 or 3) #OK, but... long print "OK\n" if ($test == 7 or $test == 5 or $test == 3); #NOT OK #print "OK\n" if ($test == (7 or 5 or 3)); #OK? print "OK\n" if ($test =~ /[753]/);