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LEARNING TO CODE IN A PLAYGROUND
A “Hello, world!” app is no small accomplishment, but now it’s time to really learn how to write some code. Xcode provides a special type of document called a playground, which is a great place to learn how to program. In a playground, you can write and run code immediately to see the results, without going through the trouble of writing a whole app, as we did in Chapter 1.
Let’s open a playground. Open Xcode and select Get started with a playground, as shown in the Welcome to Xcode dialog in Figure 2-1. If this window doesn’t automatically open, select Welcome to Xcode from the Window option in the menu or press ...
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