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Test: Swift - Type Inference, Type Safety, and Type Conversion
4. Which of the following is preferred style in Swift?
Results Congratulations! Correct Answer. You Answered: None. If you took the test, your answer will show up here. Correct Answer: var score = 42; var score:Int; Explanation Option A is preferred style in Swift. Since an Int literal has been assigned during the declaration, score will have a type Int. In option B, the type is explicitly mentioned, which is unnecessary. C is also ok, because we might not know at the time of declaration the value of score — but we will assign it before it’s used. But Swift will have to know what the type is, and hence explicit type annotation is needed. D will result in an error, because a Float/Double value is being assigned to Int type.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 miscellaneous topics and concepts in Swift: Type Inference, Type Aliases, Type Safety, and Type Conversion
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This is a test on Type Inference, Type Safety, and Type Conversion in Swift.
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This is a test on Type Inference, Type Safety, and Type Conversion in Swift.
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