Octave, 13 11 8 bytes

Didn't expect to golf this answer down, but wohoo, a bug(?) in Octave made it possible to save two bytes! :) Converting this to a "full program", instead of a function saves an additional three bytes, leaving us with 8 bytes:

['',833]

['',833] concatenates the empty string with the number 883. The ASCII code for A is 65, so 883 might seem a bit odd. I think this must be a bug, but what Octave does when concatenating an empty string and a number is that it takes the number modulus 256. mod(883, 256) == 65 which just so happens to be the ASCII code for A.

Octave does not do this when using the "proper" method, char(883), in which case we will get:

warning: range error for conversion to character value