Int vs Integer in Swift

int, ios, swift

Solution

An `Int` is the type whilst an `Integer` is a protocol it implements.

You should be using `Int` in declarations, i.e:

var num: Int = 5

which is also the type that's inferred for integer literals when a type isn't specified, i.e:

var num = 5

Problem

Does anyone know what the difference is between these two types? The docs only refer to `Int` but Xcode 6 auto complete only gives me `Integer` when I type. I started using `Integer` when porting code only to find that you have to cast between the two types. For instance the following code gives the error Could not find an overload for '+' that accepts the supplied arguments. ``` var number1 : Int = 5 var number2 : Integer = 10 number1 + number2 ```

Original source