why we will use abstract class?

Hi Sandhya,

Abstract classes are typically used to define a base class in the hierarchy.The purpose of abstract class is to provide default functionality to its sub classes.When a method is declared as abstract in the base class then every derived class of that class must provide its own definition for that method.

Use Abstract class when there is a 'IS-A' relationship between classes. For example, Car is a Vehicle, Truck is a Vehicle. So, Vehicle can be an abstract class with common implementation like model, Color etc.

Please refer to these links for a better understanding

https://www.codeproject.com/Articles/6118/All-about-abstract-classes

http://www.c-sharpcorner.com/article/why-do-we-use-abstract-class2/

Hope this helps

2 Replies

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Amit Kumar8y ago
Hi,
In simple word : Abstract class is used, if we want to use all functions or some fuction of base class used in child class.
Ankit Sharma8y ago
Hi Sandhya,

Abstract classes are typically used to define a base class in the hierarchy.The purpose of abstract class is to provide default functionality to its sub classes.When a method is declared as abstract in the base class then every derived class of that class must provide its own definition for that method.

Use Abstract class when there is a 'IS-A' relationship between classes. For example, Car is a Vehicle, Truck is a Vehicle. So, Vehicle can be an abstract class with common implementation like model, Color etc.

Please refer to these links for a better understanding

https://www.codeproject.com/Articles/6118/All-about-abstract-classes

http://www.c-sharpcorner.com/article/why-do-we-use-abstract-class2/

Hope this helps