This code snippet provides a utility for converting numerical values into their textual representation in the Indian number format, commonly used for currency amounts.

indian_currency_converter_in_words.ts

export const getNumbersToWord = (numbers: any) => {
  // stores word representation of given number n
  let inWords = '';
  // handles digits at ten millions and hundred
  // millions places (if any)
  inWords += getTranslatedNumber(Math.floor(numbers / 10000000), 'Crore ');
  // handles digits at hundred thousands and one
  // millions places (if any)
  inWords += getTranslatedNumber(Math.floor(numbers / 100000) % 100, 'Lakh ');
  // handles digits at thousands and tens thousands
  // places (if any)
  inWords += getTranslatedNumber(
    Math.floor((numbers / 1000) % 100),
    'Thousand ',
  );
  // handles digit at hundreds places (if any)
  inWords += getTranslatedNumber(Math.floor((numbers / 100) % 10), 'Hundred ');
  if (numbers > 100 && numbers % 100 > 0) {
    inWords += 'and ';
  }
  // handles digits at ones and tens places (if any)
  inWords += getTranslatedNumber(Math.floor(numbers % 100), '');
  return inWords;
};

export const getTranslatedNumber = (numbers: any, s: string): any => {
  let inWords = '';
  const one = [
    '',
    'One ',
    'Two ',
    'Three ',
    'Four ',
    'Five ',
    'Six ',
    'Seven ',
    'Eight ',
    'Nine ',
    'Ten ',
    'Eleven ',
    'Twelve ',
    'Thirteen ',
    'Fourteen ',
    'Fifteen ',
    'Sixteen ',
    'Seventeen ',
    'Eighteen ',
    'Nineteen ',
  ];

  const ten = [
    '',
    '',
    'Twenty ',
    'Thirty ',
    'Forty ',
    'Fifty ',
    'Sixty ',
    'Seventy ',
    'Eighty ',
    'Ninety ',
  ];
  // if n is more than 19, divide it
  if (numbers > 19) {
    inWords += ten[numbers / 10] + one[numbers % 10];
  } else {
    inWords += one[numbers];
  }

  // if n is non-zero
  if (numbers != 0) {
    inWords += s;
  }

  return inWords;
};