Dart Abstract Classes - Dart Programming for Beginners

Abstract Classes are special classes in Dart that promote the idea of creating only one instance of a Class. All the members inside the abstract classes cannot be instantiated meaning, object cannot be created.
Rather these abstract classes are inherited and used as ways to template how a class should look like. This video discusses the Entire ABSTRACT CLASS in Dart completely.
Additionally Abstract classes also have a concept called as ABSTRACT METHODS which is also discussed as part of the application.
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[bishalmahanta]

5:34 you are not doing print(s.y); after assigning s.y=50; that's why we can't see the change, I don't think abstract class has one copy thing as java has as for static properties.

[rudikurniawan]

Thank you bro
I really need it for my exams

[bishalmahanta]

sir I'm bit confused with the following fact: we use final keyword to a variable to indicate that it will be runtime constant and for compile time constant we use const keyword, then how dart is letting us use final as compile time constant 3:49