Sometimes, we want to generate a random number that is 9 digits in length with JavaScript.

In this article, we’ll look at how to generate a random number that is 9 digits in length with JavaScript.

How to generate a random number that is 9 digits in length with JavaScript?

To generate a random number that is 9 digits in length with JavaScript, we use the Math.random method.

For instance, we write

const n = Math.floor(100000000 + Math.random() * 900000000);

to use 100000000 + Math.random() * 900000000 to generate a number that’s 9 digits with decimal places.

Then we call Math.floor to round it down to between 100000000 and 999999999.

Conclusion

To generate a random number that is 9 digits in length with JavaScript, we use the Math.random method.