Variable used before being initialized in function

Question

I\'m making a ro sham bo game. Functions in swift are different than what I have used before. I keep getting an error:

Variable used before being init

Answer 1

Returning an Int?

As others already said, the problem is that none of your conditions is met then returnval is not initialized.

You can use a switch statement + guard + computed property. Like this

var winner: Int? {
    guard let chosen = chosen, rval = rval else { return nil }
    switch (chosen, rval) {
    case (let chosen, let rval) where chosen == rval : return 2
    case (1, 3): return 1
    case (1, 2): return 0
    case (2, 1): return 1
    default: return nil
    }
}

Please note I slightly changed your logic. Infact in my code if chosen and rval are both nil the returned value is nil. While in your code 2 is returned. You should change it, maybe adding another guard on top of my code. Something like

guard chosen != rval else { return 2 } 

Returning Int + Fatal error

If you know chose and rval will always be populated then

var winner: Int {
    guard let chosen = chosen, rval = rval else { fatalError() }
    switch (chosen, rval) {
    case (let chosen, let rval) where chosen == rval : return 2
    case (1, 3): return 1
    case (1, 2): return 0
    case (2, 1): return 1
    default: fatalError()
    }
}