In this chapter of the free Dart course, you will learn about abstract classes, one of the key concepts in object-oriented programming with Dart. Abstract classes are used to define a common structure that other classes must follow, without providing a complete implementation.

You cannot create objects directly from an abstract class. Instead, it acts as a blueprint for other classes. This helps enforce a consistent design across your application and improves code organization and reusability.

You will learn how to declare an abstract class using the abstract keyword and how to define abstract methods that must be implemented in child classes. These methods do not contain a body in the abstract class, but they must be overridden in the classes that inherit from it.

This concept is very useful when building large applications where multiple classes share common behavior but still need their own specific implementation. It helps you follow clean architecture principles and makes your code more scalable and maintainable.

By the end of this chapter, you will clearly understand how abstract classes work in Dart and how to use them effectively in real-world projects, especially when designing structured and professional-level applications.