perl 逻辑操作符

&&  表示并且
|| 表示或者

例子：
#! /usr/bin/perl
my $n=3;
if ($n<10 && $n>1) {
        print "n is more than 1 and little than 10\n";
}

if ($n>1 || $n<0) {
        print "n is more than 1 or little than 0\n";
}