SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">

JavaScript

var a = "1";
var b = "2";
var c = parseInt(a, 10) + parseInt(b, 10);
alert("Parsed result: " + c);
var d = a+b;
alert("Non-parsed result: " + d);
//or: var c = parseFloat(a) + parseFloat(b);