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Test: Swift - Introduction to Optionals
1. What can a variable declared as Optional in Swift hold?
Results Congratulations! Correct Answer. You Answered: None. If you took the test, your answer will show up here. Correct Answer: A no-value; Any value of the specific type used in its declaration; Explanation An Optional in Swift can hold a state of no-value (i.e. absence of a value) or some specific value of that particular type. For example, var name: String? declaration can have nil as its value or some string value (like “John”).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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Test is Based on this Article
This article talks about the purpose of Optionals in Swift and how to declare them in your code.
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This is a test on basic concepts of Optionals in Swift.
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