Learn to write cleaner, more modular, and more scalable code in JavaScript by gaining mastery of Object Oriented Programming (OOP). 

You'll start with the basics of object-oriented programming and build up to more advanced concepts such as prototypal inheritance, prototype chaining, method overriding and mixins. Along the way, you'll learn how each concept applies to JavaScript's sometimes unique way of handling things. You'll also see how various JavaScript features make it particularly convenient for OOP, with particular emphasis on changes introduced in ES6.

This course is filled with hands-on coding challenges, playgrounds, snippets, and illustrations to keep things interactive.

Learn Object-Oriented Programming in JavaScript

## Problem Statement

A *constructor* function called `Student` is given with the following parameters:

* `marks1` 
* `marks2` 

>**Important Note**: Both `marks1` and `marks2` should be assigned to **protected** variables, `_marks1` and `_marks2`, during initialization.

Next, you have to define the following methods such that they can be shared by all object instances created:

* `getMarks(markNumber)`: a method which should return `_marks1` if `markNumber` equals **1** and `_marks2`  if `markNumber` equals **2**.

* `calcTotal()`: the method should *return* the **sum** of `_marks1` and `_marks2`.


# Problem Statement

A *constructor* function called `Student` is given with the following parameters:

* `marks1` 
* `marks2` 

>**Important Note**: Both `marks1` and `marks2` should be assigned to **protected** variables, `_marks1` and `_marks2`, during initialization.

Next, you have to define the following methods such that they can be shared by all object instances created:

* `getMarks(markNumber)`: a method which should return `_marks1` if `markNumber` equals **1** and `_marks2`  if `markNumber` equals **2**.

* `calcTotal()`: the method should *return* the **sum** of `_marks1` and `_marks2`.


In this exercise, you have to calculate a student's total marks using the concept of prototypes in constructor functions.

Introduction

Objects in JavaScript

Functions as Objects

OOP in JS - Exam 1

Classes

Inheritance

OOP in JS - Exam 2

Exercise 3: Calculate the Student's Total Marks

Problem Statement