JavaScript Unary Operators

<!DOCTYPE html>
<html>
<body>

<p> Unary Operators </p>

<script>
let x = null;  /*  null= 0 */
let y = +x;
document.write("<b>" + typeof(x) +"<b><br>");
document.write("<b>" + y +"<b><br>");
document.write("<b>" + typeof(y) +"<b><br>");
</script>

</body>
</html>