How to generate a n-digit number using JavaScript? Last Updated : 25 Jun, 2024 Summarize Suggest changes Share Like Article Like Report 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() MethodUsing Math.random()Get the minimum and maximum number of n digits in variable min and max respectively. Then generate a random number using Math.random()(value lies between 0 and 1). Multiply the number by (max-min+1), get its floor value, and then add a min value to it. Example: The example below shows how to generate a n-digit number using JavaScript. HTML <!DOCTYPE HTML> <html> <head> <title> Generate a n-digit number using JavaScript </title> <style> body { text-align: center; } h1 { color: green; } #geeks { color: green; font-size: 29px; font-weight: bold; } </style> </head> <body> <p> <!-- min and max are 5 digit so--> Click on the button to generate random 5 digit number </p> <button onclick="gfg();"> click here </button> <p id="geeks"> </p> <script> let up = document.getElementById('GFG_UP'); let down = document.getElementById('geeks'); function gfg() { let minm = 10000; let maxm = 99999; down.innerHTML = Math.floor(Math .random() * (maxm - minm + 1)) + minm; } </script> </body> </html> Output: OutputMath.random() Method and .substring() MethodMath.random() method use .substring() method to generate a random number between 0 and 1. Now we will use to get a part of the random number after converting it to string. Example: The example shows How to generate a n-digit number using Math.random() Method and .substring() Method. HTML <!DOCTYPE HTML> <html> <head> <title> Generate a n-digit number using JavaScript </title> <style> body { text-align: center; } h1 { color: green; } #geeks { color: green; font-size: 29px; font-weight: bold; } </style> </head> <body style="text-align:center;"> <p> Click on the button to generate random 6 digit number </p> <button onclick="gfg();"> click here </button> <p id="geeks"> </p> <script> let down = document.getElementById('geeks'); function gfg() { down.innerHTML = ("" + Math.random()).substring(2, 8); } </script> </body> </html> Output: Output Advertise with us Next Article How to add float numbers using JavaScript ? P PranchalKatiyar Follow Similar Reads How numbers are stored in JavaScript ? In this article, we will try to understand how numbers are stored in JavaScript. Like any other programming language, all the data is stored inside the computer in the form of binary numbers 0 and 1. Since computers can only understand and process data in the form of 0's and 1's. In JavaScript, ther 6 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 convert a value to a safe integer using JavaScript ? In this article, we will learn How to convert a value to a safe integer using JavaScript. We have given a number, and we have to convert it into a safe integer using JavaScript. Safe Integers are integers between -(253 - 1) and (253 - 1). Approach: First, we take input using the prompt in JavaScript 2 min read How to add float numbers using JavaScript ? Given two or more numbers the task is to get the float addition in the desired format with the help of JavaScript. There are two methods to solve this problem which are discussed below: Table of Content Using parseFloat() and toFixed() method Using parseFloat() and Math.round() method Using Number() 2 min read Calculate current week number in JavaScript Calculating the current week number involves determining which week of the year the current date falls into. The method of calculation can vary slightly depending on the rules you follow, such as which day starts the week (Sunday or Monday) and how the first week of the year is defined.For example:J 2 min read How to Convert a Float Number to the Whole Number in JavaScript? Given a float number and the task is to convert a float number to a whole number using JavaScript. Below are various methods to convert float numbers to whole numbers in JavaScript:Table of ContentMath.floor (floating argument)Math.ceil (floating argument) Math.round (floating argument)Math.trunc (f 4 min read How to convert Number to Boolean in JavaScript ? We convert a Number to Boolean by using the JavaScript Boolean() method and double NOT operator(!!). A JavaScript boolean results in one of two values i.e. true or false. However, if one wants to convert a variable that stores integer “0†or “1†into Boolean Value i.e. "false" or "true". Below are 2 min read Convert a Number to a String in JavaScript These are the following ways to Convert a number to a string in JavaScript:1. Using toString() Method (Efficient and Simple Method)This method belongs to the Number.Prototype object. It takes an integer or a floating-point number and converts it into a string type.JavaScriptlet a = 20; console.log(a 1 min read Convert a negative number to positive in JavaScript In this article, we will see how we can convert a negative number to a positive number in JavaScript by the methods described below. Below are the methods to convert a negative number to a positive in JavaScript: Table of Content Multiplying by -1Using Math.abs()adding a minus signFlipping the bitUs 4 min read Check a Number is Prime or Not Using JavaScript A prime number is a whole number greater than 1, which has no positive divisors other than 1 and itself. In other words, prime numbers cannot be formed by multiplying two smaller natural numbers. For example:2, 3, 5, 7, 11, and 13 are prime numbers.4, 6, 8, 9, and 12 are not prime numbers because th 5 min read Article Tags : JavaScript Web Technologies CSS-Misc HTML-Misc HTML-Questions +1 More Like