Transforming Numbers into Words: Learn How to Convert JS Numbers to Strings with Practical Code Examples

Table of content

  1. Introduction
  2. Understanding JS Numbers and Strings
  3. Converting JS Numbers to Strings
  4. Examples of Converting Numbers to Words
  5. Best Practices for Converting JS Numbers to Strings
  6. Troubleshooting and Common Mistakes
  7. Conclusion


Hey there, fellow tech-lovers! Have you ever wanted to turn a long string of numbers into words? It might not be something you need to do everyday, but it's a nifty little skill to have in your toolbox. Plus, it's just plain fun to see how amazing it can be to transform boring old numbers into descriptive language.

In this article, I'm going to show you how to convert JS numbers into strings with some practical code examples. Don't worry if you're not a coding expert; I'm going to break it down step-by-step so anyone can follow along.

First things first, let's talk a little bit about why you might want to do this. Converting numbers to words is a handy trick when you're working on a project that requires you to display data in a user-friendly way. For example, let's say you're creating an app that lists the prices of different items. Rather than simply displaying a boring string of numbers (e.g. $14.99), you could convert that number to words and display it as "fourteen dollars and ninety-nine cents." See the difference? It's a small touch, but it can make a world of difference in the user experience.

So, are you ready to learn how to do this yourself? Buckle up and let's get started on this exciting coding adventure together!

Understanding JS Numbers and Strings

Alright, so let's start by understanding some basics of JS (JavaScript) numbers and strings. Numbers in JavaScript are essentially just numerical values that can be used for mathematical operations. They can also be of different types such as integers, floats, and so on. Meanwhile, a string is a sequence of characters enclosed within two single or double-quotes. Strings are usually used to represent textual data.

Now, here's the nifty part. Did you know that you can actually convert JS numbers into strings? Yup, that's right! It's a straightforward process and can come in handy in various situations. For instance, let's say you're building a web app where you need to display a user's bank account balance in words instead of numerals. Instead of manually typing out the amount in words, you can utilize JS functions to make the conversion easier.

So, how amazing would it be if you could just write a few lines of code and voila! The number is presented to you in words? That's where understanding the basics of JS numbers and strings comes in handy. And the good news is that it's not rocket science! Trust me, I'm no coding guru but I've managed to master it, and so can you!

Converting JS Numbers to Strings

is something that we all may have to do when working with JavaScript. And let's be honest, it's not the most exciting task, but it is highly valuable! You may find yourself in a situation where you need to convert numbers to words or to display a number in a specific format, and that's where these skills come in handy.

The good news is, is actually pretty easy once you get the hang of it. There are a few different ways to do it, depending on what you need the outcome to be. One way is to use the toString() method, which converts a number to a string. Another nifty trick is to add an empty string to the number, which converts it to a string as well.

Now, I know what you're thinking: "But why do I need to know this? It sounds pretty straightforward." Well, my friend, let me tell you how amazing it can be if you know how to convert numbers to strings. For example, if you're building an app that requires data entry, and you need to format the input into a specific way (such as a phone number or credit card number), you can use your new skills to make that happen.

So take a few minutes to learn how to convert JS Numbers to Strings – it may just save you a headache in the future!

Examples of Converting Numbers to Words

Let me share with you some nifty using JavaScript. It's amazing how easy it is to convert numerical values into their written forms with just a few lines of code!

Here's a simple example that takes a number between 1 and 999 and converts it to its word form:

function convertNumberToWord(num){
    var ones = ['','one','two','three','four','five','six','seven','eight','nine'];
    var tens = ['','ten','twenty','thirty','forty','fifty','sixty','seventy','eighty','ninety'];
    var hundreds = ['','one hundred','two hundred','three hundred','four hundred','five hundred','six hundred','seven hundred','eight hundred','nine hundred'];
    if(num === 0){
        return "zero";
    if(num > 99){
        return hundreds[Math.floor(num / 100)] + " " + convertNumberToWord(num % 100);
    else if(num > 9){
        return tens[Math.floor(num / 10)] + " " + convertNumberToWord(num % 10);
        return ones[num];

This function uses three arrays ones, tens, and hundreds to convert the input number into its word form. In the if statement, we check if the input number is equal to zero. If it is, we return the string "zero". The if function checks if the input number is greater than 99. If it is, we calculate the hundreds digit, concatenate it with the string "hundred", and recursively call the convertNumberToWord function again with the remainder. If the input number is less than 100, we calculate the tens and ones digits and concatenate them with the appropriate strings.

Here's another example that converts a number to its ordinal form:

function convertNumberToOrdinal(num) {
    if (num === 0) {
        return num;
    switch(num % 100){
        case 11:
        case 12:
        case 13:
            return num + "th";
    switch(num % 10){
        case 1:
            return num + "st";
        case 2:
            return num + "nd";
        case 3:
            return num + "rd";
            return num + "th";

This function uses a switch statement to determine the ordinal form of the input number. The first switch statement checks if the last two digits of the input number are 11, 12, or 13. If they are, we concatenate the string "th" to the input number. The second switch statement checks the last digit of the input number and concatenates the appropriate suffix to the number.

These are just a few examples of how you can convert numbers to words using JavaScript. With a little bit of creativity, you can use these functions to build some really powerful and useful applications!

Best Practices for Converting JS Numbers to Strings

Converting JS numbers to strings may seem like a tedious task, but fear not! With some best practices, you can quickly and easily transform those numbers into words.

First, make sure to specify the base for your number. This is especially important if you're dealing with binary or hex numbers. By default, JavaScript assumes the base is 10, but you can specify base 2 for binary, 8 for octal, and 16 for hex.

Next, consider using the toLocaleString() method. This nifty little tool not only converts your numbers to strings, but it also adds commas to separate thousands and adjusts the decimal separator based on the user's locale.

If you want to get even fancier, you can use libraries like Numeral.js or accounting.js. These libraries offer tons of formatting options, such as showing currency symbols, specifying decimal places, and formatting negative numbers in parentheses.

Lastly, don't forget to test your code before deploying it. Try a variety of numbers and edge cases to ensure that your code works properly in all scenarios.

With these best practices in mind, you'll be a pro at converting numbers to strings in no time. Imagine how amazingd it be to effortlessly transform those boring numbers into beautiful, easy-to-read words. Happy coding!

Troubleshooting and Common Mistakes

So, you've learned how to convert JS numbers to strings – that's fantastic! But what if things go wrong? Don't worry, it happens to the best of us. Here are a few tips to help you troubleshoot and avoid some common mistakes.

First of all, double-check your code. It's easy to make a typo or forget a semicolon, and these small errors can cause big issues. Make sure your syntax is correct and your variables are named appropriately.

Another common mistake is forgetting to include the "toString()" method when converting a number to a string. Without this method, your code will not work properly. So, remember to include it every time you convert a number to a string.

If you're still having trouble, try console logging your output to see where the issue might be. This can help you identify the problem and find a solution more quickly.

Finally, don't be afraid to experiment! Try different methods and see what works best for you. Mess around with the code and see how amazing it can be to transform numbers into words.

Overall, troubleshooting may seem daunting, but with a little patience and persistence, you can overcome any problem that comes your way. Keep practicing, keep learning, and don't give up!


Alright folks, we've made it to the end of our little journey through transforming numbers into words using JavaScript. So, what have we learned?

First and foremost, we now know how to write a function that can convert any number into its word equivalent. It may seem like a small accomplishment, but it's an important tool to have in your JavaScript arsenal.

We also covered some nifty little tricks for cleaning up and formatting our code, such as using the toLocaleString() method and utilizing regular expressions to remove unwanted characters.

Most importantly, I hope that this little exercise has inspired you to keep pushing yourself to learn and try new things in your coding journey. Who knows, maybe one day you'll be able to build the next greatest app using all of the skills you've honed along the way.

So keep practicing, keep tinkering, and who knows how amazing your results can be. Thanks for joining me on this adventure, and happy coding!

As a senior DevOps Engineer, I possess extensive experience in cloud-native technologies. With my knowledge of the latest DevOps tools and technologies, I can assist your organization in growing and thriving. I am passionate about learning about modern technologies on a daily basis. My area of expertise includes, but is not limited to, Linux, Solaris, and Windows Servers, as well as Docker, K8s (AKS), Jenkins, Azure DevOps, AWS, Azure, Git, GitHub, Terraform, Ansible, Prometheus, Grafana, and Bash.

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