We began this chapter with a discussion on the Swift language and gave a brief history about the language. We also mentioned some of the changes that will be present in Swift 4 and noted that ABI stabilization will be pushed out to a future version of Swift. We then showed how to start and use Playgrounds to experiment with Swift programming. We also covered the basic Swift language syntax and discussed proper language styles. The chapter concluded with two Hello World examples.
In the next chapter, we will see how to use variables and constants in Swift. We will also look at the various data types and how to use operators in Swift.