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iOS Object-Oriented Swift Value vs Reference Types Final Exam - Solution

Posted by Antoine Guenet
Antoine Guenet
2,843 Points

Multiply an Int with a Double

I was happy to pass this final exam on Object Oriented Swift but I pretended my constant "sides" was of type "String". I see the teacher didn't encounter any problem because his calculation in the getter is sideLength * sideLength (Double). But I wanted to try with sideLength * sides (Double * Int). Obviously I get an error because I can't multiply a Double by an Int. But what would be the workaround ?

2 Answers

nicoschuele
nicoschuele
3,713 Points

Convert your Int to a Double using the Double() method. Example:

let a = 3.0
let b = 2
let c = a * Double(b)  // outputs 6.0
let d = Int(c)  // converts back your result to an Int if needed
Antoine Guenet
Antoine Guenet
2,843 Points
Antoine Guenet
Antoine Guenet
2,843 Points

Great! Thanks :-)

nicoschuele
nicoschuele
3,713 Points

Pas de soucis ;-)