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

For preventing unsafe optional unwraps I use it like below as suggested by @AntiStrike12,

 if let theString = someVariableThatIsAnInt  {        
    theStringValue = String(theString!))
 }