Typing ? (question mark sign) into Cisco IOS CLI

There are very rare occasions where you have the need to type the ? sign on Cisco IOS CLI, and when I say type it I mean really input that character and not using the IOS help.

As far as I know there aren't commands with the ? sign (you can feel free to prove me wrong though) so the most typical scenario for this would be the need to set a password with ? on it, ie: ?Cisco?Sys#

What you need to do to pull this off without the help popping up, is precede the ? with Ctrl-V. Like this:

Router(config)# username cisco password <Ctrl-V>?Cisco<Ctrl-V>?Sys#

Hope that helps, personally I never use question marks on my passwords but hey, to each his own... :)