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

Sonrobby, I believe that "Int?" means an optional int. Basically, by my understanding, needs to be unwrapped.

So doing the following works fine:

let y: Int? = 42
let c = String(y!)

That "!" unwraps the variable. Hope this helps!

As rakeshbs mentioned, make sure the variable won't be nill.