Chapter 3.  Say Hello

For historic reasons, the first program we usually make when learning a new programming language is a program that simply outputs the text Hello World to the console. Printing to the console is reasonably simple and is, therefore, often a good starting point to ensure that everything is set up correctly. To honor traditions, we will do the same with our very first program written in the Swift programming language:

print("Hello World")

Exciting! To achieve this, the chapter will cover the following topics:

• Introducing a console application
• Setting up our first Xcode playground and taking a look at the most important parts of a playground
• Writing our first Hello World program using Swift and a playground
• A quick look at how Xcode playground communicates errors and how we can use autocompletion to write code faster and more safely