Count number of decimal places in a Float (or Decimal) in Swift

Question

I want to count the number of decimal places (ignoring trailing zeros) in a Float (or NSDecimalNumber) for example:

1.45000 => 2
5.98 => 2
1.00 => 0
0.8         


        

Answer 1

For me, there is quite easy solution that works on any region and device because iOS will handle possible binary errors for you automatically:

extension Double {
    func decimalCount() -> Int {
        if self == Double(Int(self)) {
            return 0
        }

        let integerString = String(Int(self))
        let doubleString = String(Double(self))
        let decimalCount = doubleString.count - integerString.count - 1

        return decimalCount
    }
}

Edit: it should work same for Double or Float