Mastering Swift introduces Apple’s excellent Swift standard library style and incorporates usage feedback across multiple Swift projects. However, it should be regarded as a living, changeable document and the basis upon which the programming language is implemented.Before going further into the details of the Swift programming language, the book briefly explains the basic information about the language. It is a high-level language created to develop multifaceted iOS applications that cater to diverse needs of different social and business domains. It is meant to develop high-end apps with multiple complexities. But since it is very close to Objective C, it is easy to code and understand. This feature also makes it incredibly friendly to beginners. Moreover, it is equally compatible with the iPhone, the iPad, Apple Watch, MacBook, and Apple TV, and it can be applied to develop equally efficient and scalable apps for them.