closure_example.js

var myMultiplierMaker = function(factor) {
    var returnFunction = function(otherFactor) {
        return factor * otherFactor;
    }

    return returnFunction;
}

var timesFive = myMultiplierMaker(5);
var timesSeven = myMultiplierMaker(7);

console.log(timesFive(2)); // logs 10
console.log(timesSeven(2)); // logs 14