What are protocols and extensions, and how do they contribute to Swift development?

In Swift, protocols and extensions are powerful language features that contribute to the development of clean, modular, and flexible code. Let's explore what protocols and extensions are and how they enhance Swift development: 1. Protocols: * Protocols define a set of methods, properties, and other requirements that conforming types (classes, structures, or enumerations) must implement. They act as a blueprint for specifying a contract or interface that types can adhere to. * Protocols provide a way to define abstract types without specifying their actual implementation. They allow you to establish a common set of behaviors that multiple types can conform to, enabling code reuse and promoting modularity. * Conforming to a protocol is achieved by using the `:` symbol after the type's name, followed by the name of the protocol. Types that conform to a protocol must implement all the required methods and properties defined in the protocol. * Protocols also support optional requirements, where conforming types can choose to implement certain methods or properties based on their needs. 2. Extensions: * Extensions provide a mechanism to add new functionality to existing typ....