Playground is a very versatile tool. Whenever you create a new file, you can start working on it immediately without any further setup. It has an inbuilt "Results" panel on the right-hand side that will compile your code in real time every time you make any changes to the file. There is also an "assistant editor" that provides a graphical representation of the changes we make in the code.
Create a new Playground file, name it whatever you want, and then open it up. Or, if you already created a file in the first chapter, you will already have a file in the Playgrounds folder, which you can open up.
Let's take a look at the Swift syntax in practice.
If you have some experience coding ...