How ignore user string upper or lower case

Question

I made a rock paper scissors game with user input but I wanna know how to ignore the case for example ROCK to switch it rock so the code can read it.
and it's one of my first projects does the code look good ?
https://code.sololearn.com/cFGVFOj5yn6H/?ref=app

Answer 1

where at could you show me ?