Facade Pattern:

The Facade pattern is a structural design pattern that provides a simplified, unified interface to a complex system of classes, a library, or a framework. It's named "Facade" because it is an easy-to-use front end that hides complex inner workings. Benefits of the Facade Pattern: 1. Hides complexity: This pattern is used to hide the complexity of a system and provide a simple interface to the client. 2. Decouple client code from subsystems: The client code doesn't need to interact directly with the subsystems. All interactions are done through the Facade. This ensures that changes in the subsystems will have minimal, or ideally no, impact on the client code. Suppose we have a system where a client wants to book an all-inclusive holiday trip. The process involves multiple steps like booking flights, hotels, arranging transportation, etc. Each of these operations could be a subsystem in our overall system. In real life, these subsystems could be various complicated services that take multiple steps to use. The client, however, should not be concerned with these individual steps, so we use the Facade pattern to simplify the process. Implementation in Go: