Halloween Candy Problem (Swift)

Question

var a:String! = readLine()

var houses:Int! = Int(a)

var money:Int = (2/houses!) * 100

print("Your chances of getting money is \(money) ")

print("You visited this many houses: \(houses)")

// I keep getting a 0 for the first output
// How do I fix this?
// I am confused on how optionals work

This is the code I written up for the problem. I am stuck on how to fix this.

Answer 1

var a:String! = readLine()
var houses:Double! = Double(a)
var money:Double = (2/houses!) * 100
print(Int(money.rounded(.up)))