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Start your free trialNathalie Dory
2,912 PointsHow do you create an optional?
You mentioned the dictionary was composed of optional strings- how did it decide it was an optional in the first place?
1 Answer
Ryan Maneo
4,342 PointsThe back-burner code that Apple put together determined that. (In the form of an Enumeration, actually) - don't worry if you don't know what that is yet.
You don't need to worry about how to programmatically creating a custom variable optional, because, it already exists. Put "?" immediately after a type, example: let car: String?
what this does is say that a specific example or value is not required for the code to be executable. If you have any further questions, feel free to ask :)