as you can see in step 2, i create airthmaticOpration function which in this step i will treated function like a class.
airthmaticOperation.prototype.addition = function(a,b)
airthmaticOperation.prototype.multiply = function(a,b)
That looking cool Now how to use it in my function.
first you have to make object as you make in simple class like
var objMyClass = new aithmaticOperation();
Object is created and Now you are ready to access method of my class airthmaticOperation
var resultAdd = objMyClass.addition(a,b);
var resultMul = objMyClass.multiply(a,b);