I don't understand with this method on tutorial

Question

I'm try but that method is error, anybody can explain to me why I try output any 2 errors??? I have finished upload my code but on first I'm wrong,so I will reupload again.

Answer 1

Thats a question. If you see carefully, the course has already asked a question about creating arrays before it. Why should it show the same code again and again.

Its like :-
You taught someone to count till 3 and tested him. The next time you would teach him to count till 6, from 4 and not from the beginning.

Answer 2

You never created array called "myArray"...

Answer 3

but on the tutorial that it's correct answer,so I don't understand about that.you can see on the tutorial about array