How to Generate a Random Number in JavaScript? Last Updated : 14 Oct, 2024 Comments Improve Suggest changes Like Article Like Report To generate a random number in JavaScript, use the built-in methods that produce a floating-point number between 0 (inclusive) and 1 (exclusive).Below are the approaches to generate random numbers in JavaScript:Table of ContentUsing Math.random() methodUsing Math.floor() with Math.random()Using Math.ceil() with Math.random()Using Math.round() with Math.random()Using Math.random() methodThe Math.random()method in JavaScript is a foundational function for generating pseudo-random floating-point numbers between 0 (inclusive) and 1 (exclusive). Example: Randomly generating floating point number between 0 and 1 using the Math.random() method. JavaScript function random() { let randomNumber= Math.random(); console.log(randomNumber) } random(); Output0.576247647158219 Using Math.floor() with Math.random()UsingMath.floor()with Math.random() in JavaScript enables the creation of random integers within a defined range. This combination ensures a predictable outcome for applications such as games and simulations."Example: Randomly generating integer within a specific range using the Math.floor() method along with the Math.random() method. JavaScript function random() { let randomNo = Math.floor(Math.random() * 10); console.log(randomNo); } random(); Output3 Using Math.ceil() with Math.random()The Math.ceil()method in JavaScript is used to round a number up to the nearest integer greater than or equal to the original value.Example: Generating random integer using Math.ceil() along with math.random() method. JavaScript const randomInteger = Math.ceil(Math.random() * 10); console.log(randomInteger); Output10 Using Math.round() with Math.random()Using Math.round() with Math.random() in JavaScript allows for the generation of random integers by rounding the result of Math.random(). This is commonly used when a fair rounding to the nearest integer is needed.Example: The below code uses Math.round() with Math.random() to generate random number. JavaScript const randomInteger = Math.round(Math.random() * 10); console.log(randomInteger); Output4 Comment More infoAdvertise with us Next Article How to Generate a Random Number in JavaScript? Y yajasvikhqmsg Follow Improve Article Tags : JavaScript Web Technologies JavaScript-Questions Similar Reads Generate random alpha-numeric string in JavaScript In this article with the help of javascript we are generating the alpha-numeric string of specific length using javascript, here are some common method Approach 1: Creates a function that takes 2 arguments one is the length of the string that we want to generate and another is the characters that we 2 min read How to Generate Random Number in React JS? This article explores generating random numbers in React.js, accomplished through the utilization of the Math.random() method.Prerequisites:Introduction to ReactReact statesReact eventsJSX syntaxApproachTo generate Random numbers in React JS we will be using the Math.random and Math.floor methods as 2 min read Generate a Random Permutation of 1 to n in JavaScript In programming, creating a random permutation of numbers from 1 to n is a common task. 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Using Math.random(): basic ApproachThis is the simplest way to generate a random number within a range using Math.random().JavaScriptlet min = 10; let max = 20; let random = Math.floor(Math.random() * (max - m 3 min read How to generate a n-digit number using JavaScript? The task is to generate an n-Digit random number with the help of JavaScript. You can also generate random numbers in the given range using JavaScript. Below are the approaches to generate a n-digit number using JavaScript: Table of Content Using Math.random()Math.random() Method and .substring() Me 2 min read How to Generate a Random Boolean using JavaScript? To generate a random boolean in JavaScript, use Math.random(), which returns a random number between 0 and 1.Approach: Using Math.random() functionCalculate Math.random() function.If it is less than 0.5, then true otherwise false.Example 1: This example implements the above approach. JavaScript// Fu 1 min read JavaScript Application For Random Number Generator Creating a random number generator is a fun and practical project for beginners in JavaScript. It helps you learn how to handle user inputs, generate random values within a range, and dynamically update the user interface. What Weâre Going to CreateWeâll build a user-friendly application that allows 5 min read How to create a Number object using JavaScript ? In this article, we will discuss how to create a Number object using JavaScript. A number object is used to represent integers, decimal or float point numbers, and many more. The primitive wrapper object Number is used to represent and handle numbers. examples: 20, 0.25. We generally don't need to w 2 min read How to Randomly Rearrange an Object in JavaScript ? Randomly rearranging an object in JavaScript involves shuffling its properties in a random order. This operation is particularly useful for scenarios where the order of object properties needs to be randomized, such as implementing a randomizer for game elements or shuffling quiz questions. Table of 2 min read Like