Object-Oriented Programming (OOP) is a programming paradigm that organizes software design around objects rather than functions and logic. An object is a data structure that contains both data (attributes or properties) and code (methods or functions) that operates on that data. OOP enables developers to model real-world entities and relationships in code, making complex systems easier to design, understand, and maintain.
The four fundamental principles of OOP are encapsulation, inheritance, polymorphism, and abstraction. Encapsulation bundles data and methods together while restricting direct access to internal state. Inheritance allows new classes to derive properties and behaviors from existing ones. Polymorphism enables objects to be treated as instances of their parent class. Abstraction hides complex implementation details behind simple interfaces.
Languages such as Java, C++, Python, and C# are built with OOP as a core paradigm. In modern software development, OOP is widely used for building scalable applications, from mobile apps and web platforms to enterprise systems and game engines. Its modular structure promotes code reusability, making it easier for teams to collaborate on large codebases and maintain software over time.