Abstract Class

• Abstract Class : - Classes which contain one or more abstract methods or abstract properties, such methods or properties do not provide implementation.
• These abstract methods or properties are implemented in the derived classes (Sub-classes). 
• Abstract classes does not create any instances to that class objects.

Use of Abstract class:

• We can define some common functionalities in Abstract class (Super-class) and those can be used in derived classes (Sub classes).

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