Formatting decimal places with unknown number

Question

I\'m printing out a number whose value I don\'t know. In most cases the number is whole or has a trailing .5. In some cases the number ends in .25 or .75, and very rarely th

Answer 1

My 2 cents ;) Swift 3 ready

Rounds the floating number and strips the trailing zeros to the required minimum/maximum fraction digits.

extension Double {
    func toString(minimumFractionDigits: Int = 0, maximumFractionDigits: Int = 2) -> String {
        let formatter = NumberFormatter()
        formatter.locale = Locale(identifier: "en_US_POSIX")
        formatter.minimumFractionDigits = minimumFractionDigits
        formatter.maximumFractionDigits = maximumFractionDigits

        return formatter.string(from: self as NSNumber)!
    }
}

Usage:

Double(394.239).toString() // Output: 394.24
Double(394.239).toString(maximumFractionDigits: 1) // Output: 394.2