Why this code not working

Question

Hey guys i make this program in Javascript but this code is not working , so you can help me

https://code.sololearn.com/WyEh2oCF9zt3/?ref=app

Answer 1

I just cut the js code from js section and paste it in HTML code itself.

Check this -
https://code.sololearn.com/WkE2EtfeMNMk/?ref=app

Answer 2

Sachin Artani thanks

Answer 3

So, what can i do ?