Suggested approach: Go straight in and answer that this protocol allows us to loop over all cases in an enum, but then follow up with a practical example – you might have a word search generation algorithm that has enum cases for all possible directions you can place a word, so you loop over them all to try and find a valid spot for each word.
Estimated difficulty: Easy
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guardkeyword in Swift?
#errorcompiler directive do?
finalkeyword do, and why would you want to use it?
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