What Is Object-Oriented Programming

Short answer

Object-Oriented Programming organizes code into objects that contain data and behavior. It promotes reusability through inheritance, encapsulation, and polymorphism.

How it works

• Encapsulation: Bundles data and methods, hiding internal state.
• Inheritance: Lets new classes reuse and extend existing ones.
• Polymorphism: Allows different classes to respond to the same message.

Example

A Vehicle base class defines move(). Car and Bicycle subclasses override move() with their specific implementations.

Why it matters

OOP models real-world entities naturally. It is the dominant paradigm for large-scale application development in Java, C++, Python, and C#.