I'm struggling in the arrays of courses, solo can you add a comment in the code explaining how to use the arrays more efficiency

Answer 1

Try multiple resources until you fully understand it. I went through about 5 different ones via a google search before I understood arrays.
Try this first. If you still have doubt. Then search for more. Try some YouTube videos.
https://www.w3schools.com/js/js_arrays.asp

Answer 2

You can suggest it by:
[e-mail]

Here, it is No use to post..

Answer 3

Ok