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iOS Swift Basics Swift Types Recap: Swift Types

Michael Ballew
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Michael Ballew
iOS Development Techdegree Student 1,728 Points
Posted by Michael Ballew
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Michael Ballew
iOS Development Techdegree Student 1,728 Points

Clarification on Data Types

In the quiz I am taking, a multiple choice question is presented that states "Which of the following is not a numerical data type?" Choices are Int, Float, Double, Bool, None of the above. Now I understand that the boolean values of True are False are represented by 1 and 0, but this does not make it a numerical data type... does it?

I chose, Bool and got the question wrong.

2 Answers

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

If all of them are numerical data types, you should select "None of the above" because none of the above values (Int, Float, Bool) are not numerical types. In other words, all of the above are numerical types and the challenge is asking which one is not numerical; and all of the above are numerical.

Does this make sense?

I hope this helps. ~Alex

Michael Ballew
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Michael Ballew
iOS Development Techdegree Student 1,728 Points
Michael Ballew
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Michael Ballew
iOS Development Techdegree Student 1,728 Points

Thanks Alex. But my question is more about whether or not a Bool is actually a numeric type. In other languages it is not considered numeric. From the MSDN for Visual Basic, Visual Studio 2015, "Boolean values are not stored as numbers, and the stored values are not intended to be equivalent to numbers." "Boolean is not a numeric type." and so on.

Is it that Swift as its own language defines booleans differently? Thanks for your feedback.

Daniel Mangeng
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Daniel Mangeng
Front End Web Development Techdegree Student 7,641 Points

Did you get a answer to this now? I'm doing the challenge right now and im curious too.