how to get a random number in a variable js code example

Example 1: random js

function randomNumber(min, max) {
  return Math.floor(Math.random() * (max - min)) + min + 1;
}

Example 2: how to write a program that shows a random number between 1 and 100 in your browser

var randomNum ;
randomNum = Math.ceil(Math.random() * 100);
document.write("Random number between 1 and 100: " + randomNum)