ex4.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Multiplication</title>
</head>
<body>
  <div id="target"></div>

  <script type="text/javascript">

  var n = 1, product = 0;

  while (n <= 10) {
    product = product + n;
    n++;
  }
  document.querySelector('#target').innerHTML = "The sum of 1 through " + (n - 1) + " is "+ product +",";

  </script>
</body>
</html>