What is the difference between an interface and an abstract class in programming?

What is the difference between an interface and an abstract class in programming?

An interface defines a contract that implementing classes must follow, while an abstract class can provide some implementation.

Can you give me an example of when to use an interface?

Use an interface when you want to define a role that multiple classes can implement, like 'Drawable' for shapes.

And when should I use an abstract class instead?

Use an abstract class when you want to share code among closely related classes, like 'Animal' with common behaviors.

Are there any limitations to using interfaces?

Yes, interfaces cannot have any implementation or state, while abstract classes can have both.