Javascript innerhtml output example

            <!DOCTYPE html>
<html>
<body>

  <h1>Javascript Output</h1>
  <p>Displaying the output in HTML elements, using innerHTML attribute. </p>
  <p id="demo"></p>
  <button type="button" onclick="functionName()">Click Me!</button>

  <script>
    function functionName(){
        document.getElementById("demo").innerHTML = 10 + 10;
    }
  </script>

</body>
</html>
        

            
        