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Kotlin OOP (Object-Oriented Programming)

OOP stands for Object-Oriented Programming

Kotlin - What is OOP?

OOP stands for Object-Oriented Programming.

Procedural programming is about writing procedures or methods that perform operations on the data, while object-oriented programming is about creating objects that contain both data and methods.

Object-oriented programming has several advantages over procedural programming:

  • OOP is faster and easier to execute
  • OOP provides a clear structure for the programs
  • OOP helps to keep the Kotlin code DRY "Don't Repeat Yourself", and makes the code easier to maintain, modify and debug
  • OOP makes it possible to create full reusable applications with less code and shorter development time
    • Tip: The "Don't Repeat Yourself" (DRY) principle is about reducing the repetition of code. You should extract out the codes that are common for the application, and place them at a single place and reuse them instead of repeating it.

    Kotlin - What are Classes and Objects?

    Classes and objects are the two main aspects of object-oriented programming.

    Look at the following illustration to see the difference between class and objects:

    class

    Fruit

    objects

    Apple

    Banana

    Mango

    Another example:

    class

    Car

    objects

    Volvo

    Audi

    Toyota

    So, a class is a template for objects, and an object is an instance of a class.

    When the individual objects are created, they inherit all the variables and methods from the class.

    You will learn much more about classes and objects in the next chapter.

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