Numbers to Words.js

gistfile1.txt

// Based on https://www.geeksforgeeks.org/program-to-convert-a-given-number-to-words-set-2/

var ones = {
    0: "", // Not used, to make array indexing simple
    1: "one ",
    2: "two ",
    3: "three ",
    4: "four ",
    5: "five ",
    6: "six ",
    7: "seven ",
    8: "eight ",
    9: "nine ",
    10: "ten ",
    11: "eleven ",
    12: "twelve ",
    13: "thirteen ",
    14: "fourteen ",
    15: "fifteen ",
    16: "sixteen ",
    17: "seventeen ",
    18: "eighteen ",
    19: "nineteen "
};

var tens = {
    0: "", // Not used, to make array indexing simple
    1: "", // Not used, as we handle special cases in numbersToWords
    2: "twenty ",
    3: "thirty ",
    4: "forty ",
    5: "fifty ",
    6: "sixty ",
    7: "seventy ",
    8: "eighty ",
    9: "ninety "
};


function numToWords(number, unitSuffix) {
  var words = "";

  // Handle hundreds digit
  if (Math.floor(number / 100) > 0) {
    // Add hundreds word
    words += ones[Math.floor(number / 100)] + "hundred ";
  }

  // Handle remaining tens and ones
  number %= 100;  // Get remaining number after removing hundreds

  // Use existing logic for tens and ones
  if (number > 19) {
    words += tens[parseInt(number / 10)] + ones[number % 10];
  } else if (number > 0) {
    words += ones[number];
  }

  // Add the specified string unit only if number is non-zero
  if (number > 0) {
    words += unitSuffix;
  }

  return words;
}



// Function to convert the integer part of a number to words
function convertIntegerToWords(n) {
    // stores word representation of given number n
    var out = "";

    // handles digits at billions places (if any)
    out += numToWords(Math.floor(n / 1000000000), "billion ");

    // handles digits at millions places (if any)
    out += numToWords(Math.floor((n / 1000000) % 1000), "million ");

    // handles digits at thousands places (if any)
    out += numToWords(Math.floor((n / 1000) % 1000), "thousand ");

    // handles digits at hundreds places (if any)
    out += numToWords(Math.floor((n / 100) % 10), "hundred ");

    // adds 'and' if the number is greater than 100 and the remaining part is non-zero
    if (n > 100 && n % 100 > 0) {
        out += "and ";
    }

    // handles digits at ones and tens places (if any)
    out += numToWords(Math.floor(n % 100), "");

    return out;
}

// Function to convert the fractional part of a number to words
function convertFractionToWords(n) {
    // Convert the fractional part to words
    var fractionalWords = "";
    if (n > 0) {
        fractionalWords = "point ";
        var fractionalString = n.toFixed(2).split('.')[1]; // Convert to fixed length decimal string
        fractionalWords += numToWords(Math.floor(fractionalString % 100), ""); // handles digits at ones and tens places (if any)
    }

    return fractionalWords.trim();
}

// Example Usage
n = 555.77;
console.log(convertIntegerToWords(n));
console.log(convertFractionToWords(n))