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iOS

Posted by James Calby
James Calby
15,202 Points

optional Int that has a 50% chance to be nil ?

Can Anyone explain how to to this? I'm super confused.

  • Create an optional Int that has a 50% chance to be nil and a 50% chance to be a random value between 1 and 10
  • Convert the variable to a string WITHOUT force-unwrapping.
  • If nil, print "The variable is nil" to the console as part of your optional binding

What I have so far.

var optionalInt:Int?
var randomInt = Int(arc4random_uniform(2))

if(randomInt == 0){

    optionalInt = Int(arc4random_uniform(11))
 }
 else{
    if let intValue = optionalInt, if String? myString = String(intValue)
     {
         print(myString)
     }
 }

1 Answer

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points
Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

I am going to use the ternary operator to create a optional Int:

var optionalInt: Int? = Int(arc4random_uniform(2)) == 0 ? nil : Int(arc4random_uniform(11))

I will then use an if-let statement to see if the variable is ni and then do the printingl:

if let int = optionalInt {
    let string = String(int)
} else {
    print("The variable is nil")
}

This may or may not work. Could you add the link to the challenge in your question?