Explain the Bridge design pattern.

The Bridge design pattern is a structural design pattern that decouples an abstraction from its implementation, allowing them to vary independently. It involves creating two separate hierarchies: one for the abstraction and another for the implementation. The bridge pattern allows the abstraction and implementation to be modified and extended independently without affecting each other.

In this pattern, the abstraction represents an interface or an abstract class that defines the high-level functionality, while the implementation represents the concrete classes that provide the low-level implementation details. The abstraction contains a reference to the implementation, which can be set at runtime.

By using the bridge pattern, we can achieve loose coupling between the abstraction and implementation, making it easier to modify and extend both independently. It also promotes code reusability and flexibility, as different implementations can be easily swapped without affecting the client code.

Overall, the Bridge design pattern provides a way to separate the abstraction from its implementation, allowing for more flexible and maintainable software design.