It depends what you mean by "try". If you try to rob a bank but your car breaks down before you get there, so you give up, that's not bank robbery. You may st

It depends what you mean by "try". If you try to rob a bank but your car breaks down before you get there, so you give up, that's not bank robbery. You may still be guilty of criminal conspiracy or something but not bank robbery. These are legally technical areas that are more complicated than what you're portraying.