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What is Abstract Class?


  • Abstract Class mostly used as a base class.
  • Abstract class is a class that cannot be instantiated, it exists extensively for inheritance and it must be inherited.
  • An Abstract Method of an Abstract Class must be overridden.
  • Abstract classes are classes that contain one or more abstract methods (methods without implementation).
  • Abstract classes cannot be used to instantiate objects; because abstract classes are incomplete, it may contain only definition of the properties or methods and derived classes that inherit this implements it's properties or methods.
  • There are scenarios in which it is useful to define classes that is not intended to instantiate; because such classes normally are used as base-class.
  • An abstract method is a method that is declared, but doesn't contain implementation (like method declaration in the interface).
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