How to Generate a Random Number between Two Numbers in JavaScript

Updated onbyAlan Morel
How to Generate a Random Number between Two Numbers in JavaScript

Randomness is extremely useful in programming.

It allows you to simulate random events in your program and add unpredictability to your code.

In this post, we'll learn how you can generate a random number between two numbers in JavaScript.

How to generate a random number between two numbers in JavaScript

To start off, let's start with the low and high end of the range.

const low = 1;
const high = 10;

We can use this in conjunction with the Math.random() function.

This function will return a random number between 0 and 1.

With some simple math, we can generate a random number between the low and high end.

const low = 1;
const high = 10;

const randomNumber = Math.floor(Math.random() * (high - low + 1)) + low;

console.log(randomNumber);

We use the Math.floor function to round the random number down to the nearest integer.

You can also turn this into a function:

const low = 1;
const high = 10;

const getRandomNumber = (low, high) => {
    return Math.floor(Math.random() * (high - low + 1)) + low;
}

console.log(getRandomNumber(low, high));

Keep in mind that this will include both the low and high numbers that you specified.

Conclusion

In this post, we learned how to generate a random number between two numbers in JavaScript.

With the function we have above, you can pass in a low and high end of the range and get a number within it.

Thanks for reading and happy coding!

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