16. Introduction to Object Oriented Programming

Object-Oriented Programming, also known as OOP (Object-Oriented Programming), is a programming paradigm that is based on the concept of "objects". These objects are data structures that contain data in the form of fields, also known as attributes, and code in the form of procedures, known as methods. The core idea of ​​OOP is to combine data structures and behaviors (methods) into individual entities called objects.

To understand OOP, it is important to first understand what classes and objects are. A class is a template or blueprint from which objects are created. Think of a class as a blueprint for a house. The blueprint contains all the information needed to build the house, but it is not the house itself. Likewise, a class contains all the information needed to create an object, but it is not the object itself.

An object is an instance of a class. Using the house example, a house built from the blueprint is an object. Likewise, an object is an entity created from a class. Each object has its own set of data and can perform its own actions. This is important because it allows objects to operate independently of each other.

In OOP, there are four fundamental principles: encapsulation, inheritance, polymorphism, and abstraction.

Encapsulation is the concept of hiding internal details and complexity and exposing only what is necessary. This is done using methods and properties. A method is a function that does something, while a property is a variable that holds a value.

Inheritance is the concept of creating new classes based on existing classes. This allows you to reuse code, reduce complexity and improve maintainability. The existing class is called the base class, and the new class is called the derived class.

Polymorphism is the concept of allowing an object to be treated as an instance of its own class or of any class in its inheritance tree. This allows the code to be more flexible and reusable as it can work with objects of any class within the inheritance tree.

Abstraction is the concept of simplifying complex things by making them more understandable. This is done by creating abstract classes, which are classes that cannot be instantiated but can be inherited. An abstract class is like a blueprint for other classes.

In summary, Object Oriented Programming is a powerful programming paradigm that allows you to create code that is flexible, reusable, and easy to understand and maintain. By learning and applying OOP principles, you can significantly improve the quality of your code and become a more effective and efficient programmer.

With continued practice and study, Object Oriented Programming will become a valuable tool in your arsenal of programming skills. Remember, the key to becoming a good programmer is constant practice and continuous learning. So keep learning and practicing, and you'll become a master of Object Oriented Programming in no time!

Next page of the Free Ebook:

44Classes and Objects

3 minutes