What approach should I be using on getting random numbers in javascript?

Question

3h of sleep and I cant figure this out... :S

I had a working something but I am changing the code a lot and removed it now I can not figure it back out. I really need help...

<!DOCTYPE html>
<html>
<body>

<p>Click the button to display a random number between 1 and 100.</p>

<button onclick="myFunction()">myFunction()</button>
<button onclick="myFunction2()">myFunction2()</button>

<p id="demo"></p>
<p id="demo2"></p>

<script>
var number = Math.floor((Math.random() * 100) + 1);

var number2 = 0;
function myFunction() {
	number2 = Math.floor((Math.random() * 100) + 1);
    var x = document.getElementById("demo")
    x.innerHTML = number2;
}
//number2 is still 0.
function myFunction2() {
    var x = document.getElementById("demo2")
    x.innerHTML = number;
}

//number is stuck at the beginning number

</script>

</body>
</html>

I need to generate new numbers from the myFunction2. How do I achieve that ?

myfunction2( ) is generating new number every time. You should check your question once again. — shaina
– shaina, Commented Jul 26, 2017 at 14:05
@guest271314 Whenever I click on button myFunction2(), it gives a different number every time. — shaina
– shaina, Commented Jul 26, 2017 at 14:28
@shaina Your first comment references myFunction2, not myFunction — guest271314
– guest271314, Commented Jul 26, 2017 at 14:29

ali.salemwala · Accepted Answer · 2017-07-26 14:06:59Z

1

You are already creating random numbers from using myFunction() and it doesn't seem like a problem. In myFunction2() you don't change or really do anything so how do you expect it to keep creating random numbers? Could you make your question a bit more clear?

Edit: Just place this line inside your myFunction2() instead of where you have kept it and it should work:

var number = Math.floor((Math.random() * 100) + 1);

Enter this before you actually assign anything to var x.

answered Jul 26, 2017 at 14:06

ali.salemwala

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Comments

guest271314 · Accepted Answer · 2017-07-26 14:05:11Z

0

number is defined once at JavaScript at Question. You can use the same approach that you did at myFunction, define number again within myFunction2

<!DOCTYPE html>
<html>

<body>

  <p>Click the button to display a random number between 1 and 100.</p>

  <button onclick="myFunction()">myFunction()</button>
  <button onclick="myFunction2()">myFunction2()</button>

  <p id="demo"></p>
  <p id="demo2"></p>

  <script>
    var number = 0;

    var number2 = 0;

    function myFunction() {
      number2 = Math.floor((Math.random() * 100) + 1);
      var x = document.getElementById("demo")
      x.innerHTML = number2;
    }

    function myFunction2() {
      number = Math.floor((Math.random() * 100) + 1)
      var x = document.getElementById("demo2")
      x.innerHTML = number;
    }

  </script>

</body>

</html>

answered Jul 26, 2017 at 14:05

guest271314

1

3 Comments

Nakomoto Over a year ago

Lets say I have another function that needs that random number generated in myfunction() like this function3(number2);

guest271314 Over a year ago

You need to pass number2 to function3 within myFunction call, after you have redefined number2

guest271314 Over a year ago

Within myFunction2 function3(numer2) after you have redefined number2. Note that that is not original Question, see stackoverflow.com/help/how-to-ask

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