Instead of assuming, why not try it in different applications? Notepad, Word, etc. Simple text editors to see if they work or not.
I'm guessing you posted this message with either: the on-screen keyboard or a different system for you to actually type those keys?
Was anything spilled on the keyboard? Is this a laptop or desktop keyboard? If a desktop, have you tried a different keyboard on the computer? Or plugging that keyboard into a known working computer?