Introduction to OOP


Object-Oriented Programming, commonly called OOP, is a way of writing code by organizing it into objects instead of only using functions.

Each object represents a real-world entity and contains both data and behavior. This makes programs easier to understand, reuse, and maintain.

OOP is widely used in modern JavaScript applications, including frameworks like React, Angular, and backend systems like Node.js.

Why OOP is Important

  • Makes code more organized
  • Improves reusability
  • Helps manage large projects
  • Reduces duplication 
  • Makes applications easier to maintain  

OOP helps developers write clean and professional code.

Here, data and functions are separate.

As programs grow, this approach becomes difficult to manage.

Here, data and behavior are grouped inside one object.

This makes the code more organized and easier to extend.

These examples show how OOP helps organize code into meaningful structures.

By understanding the basics of OOP, students take an important step toward writing scalable, maintainable, and job-ready JavaScript applications.