Number to Words

NumberToWords.cshtml

@helper NumberToWords(int number){
    // http://stackoverflow.com/questions/2729752/converting-numbers-in-to-words-c-sharp
    if (number == 0){
        <text>zero</text>
    }

    if (number < 0){
        <text>minus @NumberToWords(Math.Abs(number))</text>
    }

    string words = "";

    if ((number / 1000000) > 0)
    {
        words += NumberToWords(number / 1000000) + " million ";
        number %= 1000000;
    }

    if ((number / 1000) > 0)
    {
        words += NumberToWords(number / 1000) + " thousand ";
        number %= 1000;
    }

    if ((number / 100) > 0)
    {
        words += NumberToWords(number / 100) + " hundred ";
        number %= 100;
    }

    if (number > 0)
    {
        if (words != ""){
            words += "and ";
        }

        var unitsMap = new[] { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };
        var tensMap = new[] { "zero", "ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety" };

        if (number < 20) {
            words += unitsMap[number];
        }
        else
        {
            words += tensMap[number / 10];
            if ((number % 10) > 0){
                words += "-" + unitsMap[number % 10];
            }
        }
    }

    @words;
}

// USAGE
// @NumberToWords(18)