Implicitly unwrapped optionals

Question 1/6: Which of these are true about optionals?

Hint: Both String? and String! might have a value or might not. Click to show.

• Option 1: Swift uses nil to represent the absence of a value.

  This is correct.

• Option 2: You shouldn't pass optionals into functions

  You can do so if you wish; there's no reason not to.

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