Which of this codes do you consider better?

Question

https://code.sololearn.com/cEtuZfs9nsmQ/?ref=app

https://code.sololearn.com/cku4mK79YU3V/?ref=app

Answer 1

I think first code is slightly better.

Answer 2

Chek out my Fibonacci function

https://code.sololearn.com/c07kHBLrF9NE/?ref=app