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Test: Swift - Summary of ?, !, and ?? in Optionals
1. Which operator is used force unwrap an optional in Swift?
Results Congratulations! Correct Answer. You Answered: None. If you took the test, your answer will show up here. Correct Answer: ! Explanation To forcibly unwrap an optional in Swift ! operator is used. If a variable name is declared as String?, to get the String value from it, you would use name!.Take the Test Take the complete test on this topic. You will be able to review answers to questions and get a test score.
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Summary of three operators (?, !, ??) used in optionals in Swift.
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Test on the usage of various Optionals operators (?, !, ??) in Swift
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