Exercise:

Create a third variable called z, assign x + y to it, and display it.

Hint: var z = x + y.

<!DOCTYPE html>
<html>
<body>

<p id="demo">Display the result here.</p> 

<script>
var x = 5;
var y = 10;
var z = x + y;
document.getElementById("demo").innerHTML = z;
</script>

</body>
</html>