JavaScript is one of the most popular languages used by programmers all around the world. In this course, you'll be introduced to the Object-Oriented Paradigm of JavaScript. The course will discuss OOP in both, ES5 and ES6 versions of JavaScript. It begins with a basic introduction to what Object-Oriented programming is, followed by its comparison to other languages. It then introduces the new  OOP features available in ES6 version and compares it to the ES5 version. The course then discusses objects in JavaScript followed by the use of function as objects in OOP. It goes over the interesting concepts of prototype objects, data encapsulation, and classes. It then delves into the more complex concepts of inheritance in both the versions, including prototypal inheritance, prototype chaining, method overriding and mixins. The course is filled with interesting illustrations to help in your understanding of the concepts as well as numerous quizzes and exercises to help you practice.

Learn Object-Oriented Programming in JavaScript

# Problem Statement
A *class* named `Product` is given below. You need to define the following in it: 

* The class `constructor` that takes the following as parameters in the exact order:
  * `_name`: the name of the product.
  * `_price`: the price of the product in dollars.
  * `_amount`: the amount of that product available. 
  * `_madeIn`: the country the product is made in.

>**Important Note:** All of the above-mentioned properties should be defined as **protected** properties in the constructor.

* In order to access the *protected* properties the following methods need to be defined: 

  * `getName`: returns the name.
  * `getPrice`: returns the price.
  * `getAmount`: returns the amount.
  * `getMadeIn`: returns the name of the country the product is made in.
  * `setAmount(num)`: sets the value amount equal to the value passed.

* Lastly, you need to implement the following methods inside the class:

  * `canSell(num)`: `num` will denote the amount of product that needs to be sold. The method checks if this amount or more is available. It'll return `true` if it does and `false` if the amount available is less than what needs to be sold.

  * `sell(num)`: the method is used to sell `num` amount of a product. It should return the updated amount of product left after selling. If the amount of product available is less than `num`, it should restock the product by adding **twice** the amount requested to the previously available amount of product and should return this updated value.









In this lesson, you have to make a class called Product and implement various methods in it.

Exercise 1: Time to Go Shopping!

Problem Statement