How to create a random number between a range JavaScript

Our job is to create a function, say createRandom, that takes in two argument and returns a pseudorandom number between the range (max exclusive).

The code for the function will be −

Example

const min = 3;
const max = 9;
const createRandom = (min, max) => {
   const diff = max - min;
   const random = Math.random();
   return Math.floor((random * diff) + min);
}
console.log(createRandom(min, max));

Understanding the code −

• We take the difference of max and min
• We create a random number
• Then we multiply the diff and random to produce random number between 0 and diff
• Then we add min to it to produce the random number between min and max

Output

Output for this code in the console will be −

6

AmitDiwan

Published on 19-Aug-2020 06:38:53

• Related Questions & Answers
• Generating n random numbers between a range - JavaScript
• Outputting a random number that falls in a certain range in JavaScript
• Generating random number in a range in C
• How to create a random vector for a range of values in R?
• How to return a random number between 0 and 199 with JavaScript?
• How to return a random number between 1 and 200 with JavaScript?
• Java Program to create random BigInteger within a given range
• How to generate a random number in JavaScript?
• How to get a pseudo-random number between 0 and 1 in JavaScript?
• Generate n random numbers between a range and pick the greatest in JavaScript
• How to generate random whole numbers in JavaScript in a specific range?
• How can I generate random number in a given range in Android?
• Random whole number between two integers JavaScript
• Armstrong numbers between a range - JavaScript
• Get Random value from a range of numbers in JavaScript?