It's somewhat traditional when learning programming languages to begin with a Hello World example. A Hello World program is simply using your code to display or log the text Hello World. It's always been the general starting point because sometimes just getting your code environment set up and having your code executing correctly is half the battle. At least, this was more the case in older programming languages.

Swift makes this easier than ever, and without going into the structure of a Swift file (which we shall do later on and is also much easier than Objective-C and past languages), here's how you create a Hello World program:

print("Hello, World!")

That's it! That is all you need to have the text Hello World appear in Xcode's debug area output.