Javascript function always returns null

Question

I am newbie to the JavaScript world. I have a doubt how the return statement works in JavaScript.

What I am trying to do is to have a function pass one arguments

Answer 1

Given Crazy Train's comment, you need to capture the matching value so you can return it later:

function exampleFunction(param) {
    var match = null;
    $.each(exampleData, function (key, value) {
        if (key == param) {
            match = value;
            return false; // to end the $.each early
        }
    });
    return match;
}