How do you use letters (on a keyboard) to control an action?

[vdemons]

I am very familiar with the "Input.KeyDown (chars)", and the chars (KEY_UP_ARROW) and all that, but I want to also use the letters to do something as well. In the Turing guide it said to use ord, and I did but it gives me an error what do I do?

[HRI]

if chars ('a')
then
%action
end if

[vdemons]

Oh well that was painfully obvious my bad thank you very much.