Operations on Numbers & Strings

[wassimans]

In the "Operations on Numbers & Strings" at (http://learn.jquery.com/javascript-101/operators/); the comment after the console.log in the following code is misleading to novice programmers:

// Addition vs. Concatenation
var foo = 1;
var bar = "2";
console.log( foo + bar ); // 12

because it doesn't show that 12 is actually a string. So, surrounding 12 with quotes or better, just mentioning that 12 is a string; will make the concept simple to grasp.

[AurelioDeRosa]

I agree with this proposal.

[arthurvr]

I opened a PR for this: #581