<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Variables</h2>
<p>A variable can chang its type. In this example x is first a string then a number:</p>
<p id="demo"></p>
<script>
let x = "Hello";
x = 5;
document.getElementById("demo").innerHTML = typeof x;
</script>
</body>
</html>
