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iOS Swift Basics (retired) Operators Binary Operators

Posted by brioz
brioz
756 Points

Why can't you specify a type for the constant areainmeters?

Why does the following not work as well?

let areainmeters: Double = area / 10.765

1 Answer

Edwin Vergara
Edwin Vergara
6,477 Points
Edwin Vergara
Edwin Vergara
6,477 Points 
let areainmeters: Double = Double(area) / 10.765
brioz
brioz
756 Points

I noticed you have to set area as a double, but if your setting the type for areainmeters as Double, why doesn't Xcode infer that the calculation should be a Double?

Edwin Vergara
Edwin Vergara
6,477 Points
Edwin Vergara
Edwin Vergara
6,477 Points

Swift is a type safe language and it encourages you to be clear about the types of values your code can work with. In Swift values are never implicitly converted to another type. If you need to convert a value to a different type, explicitly make an instance of the desired type.