Object Inside Function

JavaScript object properties can also be defined as functions and is a widely used way.

        var calculate = {
            collection: function (n1, n2) {
                return n1 + n2;
            },
            extraction: function (n1, n2) {
                return n1 - n2;
            },
            pow: function (n1, n2) {
                return n1 * n2;
            },
            division: function (n1, n2) {
                return n1 / n2;
            }
        }
        document.write(calculate.collection(3, 5))
        document.write(extraction.collection(3, 5))
        document.write(pow.collection(3, 5))
        document.write(division.collection(3, 5))