#!/bin/perl -w
$varNum = 1;
$varStr = "hello";
$varNum2 = $varNum + 1;
$varStr2 = $varStr."world";

print ($varNum."\n");
print $varStr."\n";
print $varNum2."\n";
print $varStr2."\n";

#combine string and integer
print $varStr.$varNum2."\n";
print $varNum + $varNum2;
print "\n";

#more operations
print $varNum2*$varNum2."\n";
$varNum2 = $varNum2 * $varNum2;
$varNum3 = $varNum2 - $varNum;
print $varNum2."\n";
print $varNum3."\n";