According to Gang of Four, it defines a chain of responsibilities to process a request. In other words, pass the request from one object to another until an object accepts its responsibility.
Let’s consider an example of a claims system in any corporate company. Here is the list of the price range that can be approved and by whom.
100–1000 Rs => Junior/Senior Engineers => Approved by Manager1001–10000 Rs => Managers => Approved by Senior Manager
If the amount is outside…