Can abstract class have constructor Dart?

The only difference is that the classes we’re using as interfaces don’t have the abstract keyword so one() and two() must have a body (it’s empty, but it’s still there).

The only difference is that the classes we’re using as interfaces don’t have the abstract keyword so one() and two() must have a body (it’s empty, but it’s still there).

An abstract class, which is similar to an interface, defines a class that cannot be instantiated . Abstract classes keep your code honest and type safe. It ensures that all implementation subclasses define all the properties and methods that abstract class defines, but leaves the implementation to each subclass.19 Tem 2020

An abstract class, which is similar to an interface, defines a class that cannot be instantiated . Abstract classes keep your code honest and type safe. It ensures that all implementation subclasses define all the properties and methods that abstract class defines, but leaves the implementation to each subclass.19 Tem 2020

Usage of Abstract class Because every subclass must override the parent class method by provides its own implementation . Thus, we can force the subclass to provide implementation to that method, so that is the benefit to make method abstract. We don’t require the give implementation in the parent class.