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

Swift 3:

var iString:Int = 100
var strString = String(iString)
extension String {
    init(_ value:Int){/*Brings back String() casting which was removed in swift 3*/
        self.init(describing:value)
    }
}

This avoids littering your code with the verbose: String(describing:iString)

Bonus: Add similar init methods for commonly used types such as: Bool, CGFloat etc.