Behavioral design patterns explain how objects interact with each other. These patterns describe how different objects send messages to each other to make things happen.
There are nine well-known patterns that are part of the structural design pattern type:
Chain of responsibility: This is used to process a variety of requests, each of which may be delegated to a different handler.
Command: This creates objects that can encapsulate actions or parameters so that they can be invoked later or by a different component.
Iterator: This allows us to access the elements of an object sequentially without exposing the underlying structure.
Mediator: This is used to reduce coupling between classes that communicate with each other.
Memento: This is used to capture the current state of an object and store it in a manner that can be restored later.
Observer: This allows an object to publish changes to its state. Other objects can then subscribe so that they can be notified of...