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Test: Swift - Type Aliases

2. How can type alias a tuple that represents x and y of a point - both x and y have a decimal part to their numbers?



Results
Congratulations! Correct Answer.
You Answered: None. If you took the test, your answer will show up here.
Correct Answer: typealias Point = (Float, Float); typealias PrecisePoint = (Double, Double); typealias Point = (x: Float, y: Float);
Explanation
First option is a circular reference to Int - would result in an error. Since either Float or Double can represent decimal numbers, rest of the type aliases would work. In the last example, the tuple has named parameters - that’s fine.
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Question 2 of 5


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