everyutil/number/numberToWords.js

A comprehensive library of lightweight, reusable utility functions for JavaScript and TypeScript, designed to streamline common programming tasks such as string manipulation, array processing, date handling, and more.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.numberToWords = void 0;
/**
 * Converts a number to its English words representation (simple, up to millions).
 * For example, numberToWords(123) returns "one hundred twenty-three".
 * @author @dailker
 * @param {number} n - The number to convert.
 * @returns {string} The English words representation of the number.
 */
const ones = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
const teens = ["ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"];
const tens = ["", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"];
function numberToWords(n) {
    if (n < 0)
        return "minus " + numberToWords(-n);
    if (n < 10)
        return ones[n];
    if (n < 20)
        return teens[n - 10];
    if (n < 100)
        return tens[Math.floor(n / 10)] + (n % 10 ? "-" + ones[n % 10] : "");
    if (n < 1000)
        return ones[Math.floor(n / 100)] + " hundred" + (n % 100 ? " " + numberToWords(n % 100) : "");
    if (n < 1000000)
        return numberToWords(Math.floor(n / 1000)) + " thousand" + (n % 1000 ? " " + numberToWords(n % 1000) : "");
    return n.toString();
}
exports.numberToWords = numberToWords;