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Test: Swift - Type Inference, Type Safety, and Type Conversion

1. How do you convert length variable from Int to Double (named len)?



Results
Congratulations! Correct Answer.
You Answered: None. If you took the test, your answer will show up here.
Correct Answer: var len = Double(length); var len: Double = Double(length);
Explanation
There is an initializer in Double struct that takes Int parameter and returns a Double value. B uses that format, where the type of len is inferred. D is same, but type of len is explicitly stated, which unnecessary and not recommended.
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Question 1 of 5


Test is Based on this Article
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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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