Dave Moreno Jacobsson's questions

I want to calculate the factorial of 10 using a while loop, an if branch, and a break statement.

I manage to get the factorial of 10 with the while loop, but how can I get it using the if and break statement?

let x = 10;
var i = x-1;


while(i > 1){
    x *= i;
    i--;
}
console.log(x);

I have a button that opens a container when I click it, and closes the container for me when I hit it anywhere on the screen, except when I press inside the container.

I have two problems which I can't solve:

1- I try to make the button appear above the container with z-index, but it always appears behind the container, and so I can't give it to close again.

2- Although the button is behind the container, when I hit it, it doesn't close the container. I would like to be able to close the container by clicking on the button.

<div id="box1">
  <h2>Popup</h2>
</div>
<button onclick="document.getElementById('box1').style.display='block'" id="btn-menu">button</button>


<style>
    #box1{
        position: absolute;
        top: 10px;
        left: 10px;
        width: 260px;
        height: 260px;
        background: #E2E2E2;
        padding: 20px;
        z-index: 1;
    }

    #btn-menu{
      z-index: 9;
    }
</style>

<script>
        window.addEventListener('mouseup', function(event){
          var box = document.getElementById('box1');
          if(event.target != box && event.target.parentNode != box){
            box.style.display = 'none';
          }
        });
      </script>