Need help on Caesar cipher.

Question

Hi, my code is not running correctly and need some help to identify what is wrong and how to fix because there is no error appearing just incorrect output and unfinished.

Answer 1

https://code.sololearn.com/cCU96vtN3nMh/?ref=app

Answer 2

here is my attempt

Answer 3

your code is not readable because of too many comment
but in line 26 option() does not save the return value from the function into a valiable