NEED HELP!

Question

I need help pushing into an array.
I want to push numbers in the data array, but idk how to.
Help Plese...
this is the code:
https://code.sololearn.com/Wqo92Y7XgzVP/#html

Answer 1

https://code.sololearn.com/W0iYEZIJ1vE5/?ref=app

Answer 2

with JavaScript:

arrayName.push(value);

Answer 3

That Wont Work.