In this chapter, you learned about an object's life cycle. You also learned how object constructors and destructors work. We declared classes in Python and C# and used constructor functions in JavaScript to generate blueprints for objects. We customized constructors and destructors, and tested their personalized behavior in action. We understood different ways of generating instances in the three programming languages.

Now that you have learned to start creating classes and instances, we are ready to share, protect, and hide data with the data-encapsulation features of Python, JavaScript, and C#, which is the topic of the next chapter.