How to convert amount in digits to words in English metrics?

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I want to convert amount in digits to wordsin English Metrics say million etc. Currently I have a code to convert in Indian Rupee format. I want in English Metrics form.
My code is as below:

C#

public static string NumbersToWords(int inputNumber)
{
    int inputNo = inputNumber;

    if (inputNo == 0)
        return "Zero";

    int[] numbers = new int[4];
    int first = 0;
    int u, h, t;
    System.Text.StringBuilder sb = new System.Text.StringBuilder();

    if (inputNo < 0)
    {
        sb.Append("Minus ");
        inputNo = -inputNo;
    }

    string[] words0 = {"" ,"One ", "Two ", "Three ", "Four ",
            "Five " ,"Six ", "Seven ", "Eight ", "Nine "};
    string[] words1 = {"Ten ", "Eleven ", "Twelve ", "Thirteen ", "Fourteen ",
            "Fifteen ","Sixteen ","Seventeen ","Eighteen ", "Nineteen "};
    string[] words2 = {"Twenty ", "Thirty ", "Forty ", "Fifty ", "Sixty ",
            "Seventy ","Eighty ", "Ninety "};
    string[] words3 = { "Thousand ", "Lakh ", "Crore " };

    numbers[0] = inputNo % 1000; // units
    numbers[1] = inputNo / 1000;
    numbers[2] = inputNo / 100000;
    numbers[1] = numbers[1] - 100 * numbers[2]; // thousands
    numbers[3] = inputNo / 10000000; // crores
    numbers[2] = numbers[2] - 100 * numbers[3]; // lakhs

    for (int i = 3; i > 0; i--)
    {
        if (numbers[i] != 0)
        {
            first = i;
            break;
        }
    }
    for (int i = first; i >= 0; i--)
    {
        if (numbers[i] == 0) continue;
        u = numbers[i] % 10; // ones
        t = numbers[i] / 10;
        h = numbers[i] / 100; // hundreds
        t = t - 10 * h; // tens
        if (h > 0) sb.Append(words0[h] + "Hundred ");
        if (u > 0 || t > 0)
        {
            if (h > 0 || i == 0) sb.Append("and ");
            if (t == 0)
                sb.Append(words0[u]);
            else if (t == 1)
                sb.Append(words1[u]);
            else
                sb.Append(words2[t - 2] + words0[u]);
        }
        if (i != 0) sb.Append(words3[i - 1]);
    }
    return sb.ToString().TrimEnd();
}

Posted 12-May-15 23:55pm

Kandiya

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Andy Lanng 13-May-15 6:02am

Whats the problem?
Where are you stuck?

Kandiya 13-May-15 9:32am

I want the same in English Metric . I mean in millions instead of crore, lakhs etc. Which is the indian Rupee format.

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Andy Lanng · Answer 1 · 2015-05-13T03:53:00

Ok, I think I get you but correct me if I'm wrong.

There is no single English work for lakh (100,000) or crore (10,000,000) other that One Hundred Thousand and Ten Million

I suggest you try breaking it down by sets of 10^3 and work through the Tens and Hundreds at each 10^3 in magnitude.

Pseudo-code like this

C#

//1000 = Thousand
//1000,000 = Million
//1000,000,000 - Billion
//etc...

 units = number % 1000
 thousands = number / 1000
 tUnits = thousands % 1000
 millions = thousands / 1000
 mUnits = millions % 1000

//treat units, tUnits and mUnits the same:

 string result = "";

 if(millions>0){
  result += UnitString(mUnits)
  result += " million"
 }
 if(Thousands>0){
  result += UnitString(mUnits)
  result += " thousand"
 }
 if(number>0){
  result += UnitString(mUnits)
 }
...
  private string UnitsString(int Units){
    // deal with 100's, 10's and units
  }
...

so the numbers should turn out like this:

10,000,000 = "Ten million"

12,123,123 = "Twelve million One hundred and Twenty Three Thousand One hundred and Twenty Three"

The same pattern is true of all English (Arabic) numbers of any magnitude.

10^(3*1) = 10^3 = Thousand = 1,000
10^(3*2) = 10^6 = Million = 1,000,000
10^(3*3) = 10^9 = Billion = 1,000,000,000
10^(3*4) = 10^12 = Trillion = 1,000,000,000,000
10^(3*5) = 10^15 = Quadrillion = 1,000,000,000,000,000
10^(3*6) = 10^18 = Quintilian = 1,000,000,000,000,000,000

Hope that helps

Andy ^_^