An abstract class have non abstract methods also.

Yes, an abstract class can have non-abstract methods.

Here are the steps to understand this:

1. Abstract Class: An abstract class in object-oriented programming is a class that cannot be instantiated, which means you cannot create an object of an abstract class. It is designed to act as a base class (to be inherited by other classes). Abstract class is a design concept in program development and provides a base upon which other classes are built.

2. Abstract Methods: Abstract methods are methods in the abstract class that do not have any implementation in the abstract class itself. They are declared but not defined. The class that inherits the abstract class must provide the implementation for these methods.

3. Non-Abstract Methods: Non-abstract methods are regular methods that have a complete implementation in the class itself. They are fully defined.

4. Can an abstract class have non-abstract methods? Yes, an abstract class can have non-abstract methods. It means that an abstract class can provide the default functionality for some methods. When the class is inherited, the child class has the option to use the default functionality or override it with its own functionality.

So, in conclusion, an abstract class can contain both abstract methods (methods without implementation) and non-abstract methods (methods with implementation).

Yes, an abstract class can have non-abstract methods. Here's a step-by-step explanation:

1. An abstract class in object-oriented programming is a class that cannot be instantiated, which means you cannot create an object of an abstract class. It is designed to be extended by other classes.

2. An abstract class can contain abstract methods and non-abstract methods (also known as concrete methods).

3. Abstract methods are methods declared in an abstract class without an implementation. They are declared using the keyword 'abstract' and are meant to be overridden in the subclasses of the abstract class.

4. Non-abstract methods in an abstract class are methods that have a complete implementation. These methods can provide default behavior that can be shared among the subclasses.

5. The subclasses of an abstract class can use the non-abstract methods as they are or can override them, depending on the requirements of the subclass.

6. The main purpose of an abstract class is to provide a common definition of a base class that multiple derived classes can share.