In this chapter, you learned how to take advantage of simple inheritance to specialize a base class. We designed many classes from top to bottom using properties and methods. Then, we coded these classes in Python and C#, taking advantage of the different mechanisms provided by each programming language. We coded different objects and prototypes in JavaScript.

We took advantage of operator overloading in C# and Python. We have overridden methods and properties in subclasses or object prototypes. We took advantage of polymorphism in each programming language.

Now that you learned how to take advantage of inheritance and its related concepts, we are ready to work with multiple inheritance, interfaces, and composition in Python, C#, and JavaScript, which is the topic of the next chapter.