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Test Your Knowledge: Swift - Forced Unwrapping of Optionals

Tags: unwrap, optionals, swift

Summary

Test on Forced Unwrapping of the Optionals in Swift.

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Swift - Forced Unwrapping of Optionals

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Swift - Forced Unwrapping of Optionals

Review Answers for Questions in this Test

1. var name: String? = “San Francisco” - how do you get the String value of name?

2. How do you add two variables called score1 and score2 which are of type Optional

3. var name: String? = “San “; print(name+”Francisco”) - What does it print?

4. When do you want to use forced unwrapping (with !) in Swift for further operations on the variable?

5. var totalScore = 100 - what’s the type of totalScore variable in Swift?

Article Series
Previous Article: Swift - Forced Unwrapping of Optionals	This article is part of the Series: Swift - Optionals	Next Article: Swift - Implicit Unwrapping of Optionals

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