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Test: Swift - Implicit Unwrapping of Optionals

4. var name: String! = “San Francisco!”; var displayString = “City is “ + name; print(displayString); - What does it print?




Results
Congratulations! Correct Answer.
You Answered: None. If you took the test, your answer will show up here.
Looking for the following phrases: City is San Francisco! (your answer might be correct even without these phrases)
Explanation
Since the name is automatically unwrapped, there is no need for it to be unwrapped in making the displayString by concatenating it with the String “City is”. So, there won’t be a problem in making the displayString and printing it.
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Question 4 of 5


Test is Based on this Article
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This article talks about unwrapping the optionals in Swift implicitly and the circumstances where you would use this functionality.
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Test on how and when optionals are implicitly unwrapped in Swift.

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