Exercise:

Change the first item of cars to "Opel" by referring to the index number, and display the whole array.

Hint: Remember that array indexes start with 0.

<!DOCTYPE html>
<html>
<body>

<p id="demo"></p> 

<script>
var cars = ["Saab", "Volvo", "BMW"];
cars[0] = "Opel";
document.getElementById("demo").innerHTML = cars;
</script>

</body>
</html>