Abstract Class Vs Normal Class

I need to know the difference between normal class and abstract class and also where and why we need to use abstract classits better to explain with simple real time example. So abstract classes are only meaningful to have if the programming language supports inheritance. The implementations are provided in the concrete class only after which the methods can be implemented.
abstract class vs normal class abstract class vs normal class java abstract class vs normal class c#

You cant have a non abstract class that has abstract methods methods where the signature is defined but no implementation is given thus forcing derived classes to provide an implementation.

Abstract class vs normal class. An abstract class is declared using abstract modifier. Abstract classes exist so that they can provide a combination of implemented methods and abstract methods. An abstract class is only made up of abstract methods. An abstract class can be considered as a limited version of a regular concrete class where it may contain partially implemented methods.

But we can achieve all these in a simple baseclass. Abstract class vs concrete class. I think the comments and answers have already implied this but i want to state it more bluntly. An abstract class lets you define the signature of a method without including its implementation and an abstract class wont allow you to instantiate it directly.

A concrete class completely implements all its methods. Concrete class should not be declared using abstract keyword on doing so it will also become an abstract class. The important is that the abstract class could contains abstract methods and the normal class cant. Updated 12 dec 17 1059am add a solution.

Abstract class is a class that cannot be initialized but can be extended. An abstract class cannot be instantiated directly ie. Abstract class can be considered as an abstract version of a regular concrete class while inheritance allows new classes to extend other classes. A concrete class is derived from the base class ie.

You cant do everything with a regular super class that you can do with a abstract class. An abstract method only contains definitions but no implementations. Object of such class cannot be created directly using new. If the class is declared as static then only one copy exists in memory and client code can only access it through the class itself not an instance variable.

Abstract classes marked by the keyword abstract in the class definition are typically used to define a base class in the hierarchy. We could use the abstract class when we create a large modular units. As far as i know abstract class is a special class it has all attributes of the class in addition to cant be instantiated. Classes can be either concrete or abstract depending on the level of implementation of their method functionalities.