Convert Currency Into Words In Salesforce

                       Hi folks. Whenever we go to bank for deposit we have to fill the chellan with amount and address details. So there you can see the field called "Amount In Words". On the hand we can just write the amounts in words simply but how we can do it in salesforce object field?. So I come up with idea to implement this functionality in salesforce. To implement this functionality we need two things,

1. Apex Class
2. Apex Trigger

By using apex class and apex triggers we can achieve this functionality. Check the below image to see how it will give an output before implementing.

Object            : Opportunity

Field               : Amount

Custom Field : Amount_in_Words__c (create this field before going coding)

So we are going to create an apex class and we will call this class into apex trigger.

  public with sharing class ConvertCurrencyToWords {
     
        static String[] to_19 = new string[]{ 'zero', 'One',  'Two', 'Three', 'Four',  'Five',  'Six', 'Seven',
                                              'Eight', 'Nine', 'Ten',  'Eleven', 'Twelve', 'Thirteen',  
                                              'Fourteen', 'Fifteen', 'Sixteen', 'Seventeen', 'Eighteen', 'Nineteen' };
        static String[] tens = new string[]{ 'Twenty', 'Thirty', 'Forty', 'Fifty', 'Sixty', 'Seventy', 'Eighty', 'Ninety'};
     
        static string[] denom = new string[]{ '',
                                             'Thousand',   'Million',     'Billion',    'trillion',    'quadrillion',  
                                             'quintillion', 's!xtillion',   'septillion',  'octillion',   'nonillion',  
                                             'decillion',  'undecillion',   'duodecillion', 'tredecillion',  'quattuordecillion',  
                                             's!xdecillion', 'septendecillion', 'octodecillion', 'novemdecillion', 'vigintillion' };
    // convert a value < 100 to English.  
   public static string convert_nn(integer val) {
             if (val < 20)
        return to_19[val];
      if (val == 100)
          return 'One Hundred';
      for (integer v = 0; v < tens.size(); v++) {
        String dcap = tens[v];
        integer dval = 20 + 10 * v;
        if (dval + 10 > val) {
          if (Math.Mod(val,10) != 0)
            return dcap + ' ' + to_19[Math.Mod(val,10)];
          return dcap;
        }    
      }
      return 'Should never get here, less than 100 failure';
    }
    // convert a value < 1000 to english, special cased because it is the level that kicks   
    // off the < 100 special case. The rest are more general. This also allows you to  
    // get strings in the form of "forty-five hundred" if called directly.  
    public static String convert_nnn(integer val) {
      string word = '';
      integer rem = val / 100;
      integer mod = Math.mod(val,100);
      if (rem > 0) {
        word = to_19[rem] + ' Hundred and';
        if (mod > 0) {
          word += ' ';
        }
      }
      if (mod > 0) {
        word += convert_nn(mod);
      }
      return word;
    }
    public static String english_number(long val) {
      if (val < 100) {
        return convert_nn(val.intValue());
      }
      if (val < 1000) {
        return convert_nnn(val.intValue());
      }
      for (integer v = 0; v < denom.size(); v++) {
        integer didx = v - 1;
        integer dval = (integer)Math.pow(1000, v);
        if (dval > val) {
          integer mod = (integer)Math.pow(1000, didx);
          integer l = (integer) val / mod;
          integer r = (integer) val - (l * mod);
          String ret = convert_nnn(l) + ' ' + denom[didx];
          if (r > 0) {
            ret += ', ' + english_number(r);
          }
          return ret;
        }
      }
      return 'Should never get here, bottomed out in english_number';
    }
  }

Trigger

trigger ConvertCurrencyToWords on Opportunity (before insert, before update) {

    for (Opportunity c : Trigger.new) {
        if (c.Amount != null && c.Amount >= 0) {
         
            Long n = c.Amount.longValue();
            string amo = ConvertCurrencyToWords.english_number(n);
            string amo1 = amo.remove(',');
            c.Amount_in_Words__c = amo1;
        } else {
            c.Amount_in_Words__c = null;
        }
    }
}

Now goto opportunity -> edit or create a record -> enter value for amount field->click on save->now you can see that amount in words at amount_in_words__c field.

Hope it helps you. If you have any query comment below. Thanks!!.