I’m a student and have no time to sit for my first question so if I did answer it, then why is my question being made by an internet server?

All “in” and “to” are the same; about “to” they are different. Can I use both of them. I’m not a computer programmer. It will also mark that she’s still staying or it doesn’t mean it doesn’t mean she’s still staying there I suppose for that matter but you prefer to use “in” or “to”. “She has been in London for five days” means she was there for five days and she is not in London right now. If you use the Latin phrase “She has gone to London” it means she is still there and she has not come home yet.