swift How to cast from Int? to String

Question

In Swift, i cant cast Int to String by:

var iString:Int = 100
var strString = String(iString)

But my variable in Int? , there for error:

Answer 1

Optional Int -> Optional String:

If x: Int? (or Double? - doesn't matter)

var s = x.map({String($0)})

This will return String?

To get a String you can use :

var t = s ?? ""