I want to run this code. I have error. Thanks you.

Question

running this code. error.
https://code.sololearn.com/W1BXITcMXE30/?ref=app

Answer 1

When you call the `add()` function on line 45, you provide 2 parameters only. So parameters `c` to `k` are undefined, and all the expressions like `c.innerHTML` are invalid. This gives you the error.