random < Math < JavaScript

The Math random() static method returns a random number between 0 (included) and 1 (excluded)

    
    console.log(Math.random());
    // 0.9310115858354047  // will always be different!


    // common, more-advanced example - whole number generator
    function getRandomNumber(max) {
      return Math.floor(Math.random() * max);
    }

    console.log(getRandomNumber(5));
    // 0 - 4    // will always be different whole number