id	random-in-javascript
title	Random in JavaScript
sidebar_label	Random
sidebar_position	18
tags	JavaScript Math Object Methods Random Number Integer Range Floating-point Generate Math.random()
description	In this tutorial, we will learn about the Math.random() method in JavaScript. We will learn how to generate random numbers in JavaScript.

In JavaScript, the Math.random() method is used to generate a random floating-point number between 0 (inclusive) and 1 (exclusive).

Syntax

The syntax of the Math.random() method is as follows:

Math.random()

Example

The following example demonstrates how to use the Math.random() method to generate a random number between 0 and 1:

console.log(Math.random()); // 0.12345678901234567

In the above example, the Math.random() method returns a random floating-point number between 0 (inclusive) and 1 (exclusive).

Generate Random Number within a Range

To generate a random number within a specific range, you can use the following formula:

Math.floor(Math.random() * (max - min + 1)) + min

Where min is the minimum value and max is the maximum value.

The following example demonstrates how to generate a random number between 1 and 10:

console.log(Math.floor(Math.random() * (10 - 1 + 1)) + 1); // 5

In the above example, the Math.floor(Math.random() * (10 - 1 + 1)) + 1 expression generates a random number between 1 and 10.

Generate Random Integer

To generate a random integer within a specific range, you can use the following formula:

Math.floor(Math.random() * (max - min + 1)) + min

Where min is the minimum value and max is the maximum value.

The following example demonstrates how to generate a random integer between 1 and 10:

console.log(Math.floor(Math.random() * (10 - 1 + 1)) + 1); // 5

In the above example, the Math.floor(Math.random() * (10 - 1 + 1)) + 1 expression generates a random integer between 1 and 10.

A property of Math.random() method

The Math.random() method returns a random floating-point number between 0 (inclusive) and 1 (exclusive).

:::info 📝 Note The Math.random() method returns a random number between 0 (inclusive) and 1 (exclusive). :::

Conclusion

In this tutorial, you learned how to use the Math.random() method to generate random numbers in JavaScript. You also learned how to generate random numbers within a specific range and how to generate random integers.