optional chaining

optional chaining

func findApt (aptNumber: String ) ->String? {
    let aptNumbers = ["101", "202", "303", "404"]
    
    for tempAptNumber in aptNumbers {
        if (tempAptNumber) == aptNumber {
            return aptNumber
        }
    }
    
    return nil
}

func sendNoticeTo(#aptNumber:Int) {
    
}

if let culprit = findApt("102")?.toInt(){
    sendNoticeTo(aptNumber: culprit)
}