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Getting a random number between two variables in JS?

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

  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?
    SEMrush
    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
    SEMrush
  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