textconvert/dist/numbers/numbersToWords.js

Public library to convert text into many conventions and formats.

// Create digits in words
const numbers = 'zero one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen'.split(' ');
const tens = 'twenty thirty forty fifty sixty seventy eighty ninety'.split(' ');
/**
 * Get any number below 100 million converted to words.
 * @param number Integer input to turn into text.
 * @returns A string of numbers converted to words.
 * @example
 * numbersToWords(12345); // 'twelve thousand three hundred and forty-five'
 */
export function numbersToWords(number) {
    // Check if the number is less than 100 million
    if (number >= 100000000) {
        throw new Error('Please enter a number under 100 million!');
    }
    // Check if the input is between 0-19
    if (number < 20)
        return numbers[number];
    // Create a digit variable
    const digit = number % 10;
    // Check if the input is between 20-99
    if (number < 100)
        return tens[~~(number / 10) - 2] + (digit ? '-' + numbers[digit] : '');
    // Check if the input is between 100 and 999
    if (number < 1000)
        return (numbers[~~(number / 100)] +
            ' hundred' +
            (number % 100 == 0 ? '' : ' and ' + numbersToWords(number % 100)));
    // Check if the input is between 1,000 and 999,999
    if (number < 1000000) {
        const thousands = ~~(number / 1000);
        const remainder = number % 1000;
        return (numbersToWords(thousands) +
            ' thousand' +
            (remainder != 0 ? ' ' + numbersToWords(remainder) : ''));
    }
    // Handle millions (1,000,000 to 99,999,999)
    const millions = ~~(number / 1000000);
    const remainder = number % 1000000;
    return (numbersToWords(millions) + ' million' + (remainder != 0 ? ' ' + numbersToWords(remainder) : ''));
}