Getting a random number between two variables in JS?

Discussion in 'JavaScript' started by Mnsoldier5, Feb 24, 2019.

0
  1. #1
    I am working on an assignment and I am having difficulty writing up the function to get a random number between two variables.

    Basically what I want is the script to prompt you for the first number followed by the second then give me a random number in between those two.

    How do I get a random whole number in between two user inputted variables?

    Now I will show you the code:
    <!DOCTYPE html>
<html>
<body>
<script>
var age = prompt ("How old are you?");
var videogames = prompt ("How many hours of video games have you played last month?");
function getRndInteger(age, videogames) {
  return Math.floor(Math.random() * (videogames - age)) + age;
}
document.write (getRndInteger(age,videogames));
</script>

</body>
</html>
    Code (JavaScript):
     
    Mnsoldier5, Feb 24, 2019 IP
  2. qwikad.com

    qwikad.com Illustrious Member Affiliate Manager

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    #2
    Not sure if this is what you want: https://jsfiddle.net/h0xftysu/

    
<html>
<body>
<script>
var age = prompt ("How old are you?");
var videogames = prompt ("How many hours of video games have you played last month?");
function getRndInteger(age, videogames) {
  return Math.floor(Math.random() * (videogames + age));
}
document.write (getRndInteger(age,videogames));
</script>

</body>
</html>
    Code (markup):
     
    qwikad.com, Feb 24, 2019 IP
  3. Mnsoldier5

    Mnsoldier5 Peon

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    #3
    That doesn't appear to be working I tested age as 1 and video games as 10 and it outputted 56, no idea how.
    What did work for me is

    function getRndInteger(...args) {
  const [low, high] = [Math.min(...args), Math.max(...args)];
  return Math.floor(Math.random() * (high - low)) + low;
}
var age = prompt ("How old are you?");
var videogames = prompt ("How many hours of video games have you played last month?");

document.write getRndInteger(age,videogames));
    Code (JavaScript):
     
    Mnsoldier5, Feb 24, 2019 IP