Variables
When you launch Xcode it will ask you what you want to do, and I’d like you to choose “Get Started with a Playground” – this is a sandbox where you can type Swift code and see immediate results.
The default is a blank playground for iOS, which is fine, so click Next then Create to save it on your desktop.
In this video I want to introduce you to variables, which are places where you can store program data. They are called variables because they can vary – you can change their values freely.
Playgrounds start with a line of code that creates a variable for us:
var str = "Hello, playground"That creates a new variable called str, giving it the value “Hello, playground”. On the right of the playground you can see “Hello, playground” in the output area – that’s Xcode showing us the value was set.
Because str is a variable we can change it:
str = "Goodbye"We don’t need var the second time because the variable has already been created – we’re just changing it.
SPONSORED Are you tired of wasting time debugging your Swift app? Instabug’s SDK is here to help you minimize debugging time by providing you with complete device details, network logs, and reproduction steps with every bug report. All data is attached automatically, and it only takes a line of code to setup. Start your free trial now and get 3 months off exclusively for the Hacking with Swift Community.
Sponsor Hacking with Swift and reach the world's largest Swift community!
