Once you have a playground—written by you or others on macOS using Xcode—you can use it with the Playgrounds app on your iPad. This is a very different process from using Xcode. For one thing, now you’re working on your iPad rather than a Mac, and you’re writing the code that is going to run in the Playgrounds app.
Note that the code that you write with Xcode on your Mac runs in a playground inside Xcode on your Mac—but the playground running inside Xcode is different from a playground running in the Playgrounds app on iPad. You’ll see that side of the process in this chapter.
Two Apple ...