Is it possible to combine these two codes and create a general logic for sum of digits of any n digit number?

Question

https://code.sololearn.com/cELsRBOL0Gl6/?ref=app
https://code.sololearn.com/cuo7w0V70SM8/?ref=app

Answer 1

yes definitely :-
https://code.sololearn.com/c63x69Xzi93L/?ref=app

Answer 2

Thank you so much! :)