Noob Alert! Wrong result using loop and if statemnent

[buran]

Is there any particular reason for it?

I guess he did it in order to preserve the original list and be able to show the original unmodified list to you afterwards.

Ops, that was stupid comment on my side. It shows that nines and numbers are actually the same [mutable] object and when modify mutable objects you need to be careful. nines = numbers does not creaty a copy of numbers, it just binds name nines to same object as numbers