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Question: what is main purpose of abstract class?

Answer: if a class contains abstract method,that class must be declared as a abstract class. Abstract methods contains only declarations. it does not contain objects.

if a class contains abstract method,that class must be declared as a abstract class. Abstract methods contains only declarations. it does not contain objects. Source: CoolInterview.com

If a class contains abstract method,that class must be declared as a abstract class. Abstract methods contains only declarations. It does not contain objects.....

Source: CoolInterview.com

Even if a single method in a class is abstract then the class must be declared with the modifier abstract.
Abstract classes allows methods to be implemented in subclasses. Source: CoolInterview.com

Abstract classes are class which provides partial implementation,so does't define the complete implementation required for a class,so can't be instantiated and are generic classes also has methods commonly used by its subclasses . Class can be declared as abstract also even though it doesn't have any abstract mathod. But if it has any abstract method , must be declared class as abstract. Source: CoolInterview.com

Main purpose of abstraact class is to prevent it from getting instantiated. We cannot instantiate a class that is declared abstract. Source: CoolInterview.com

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