You have a valid point for wanting the shortcut but not for needing it (I know you dont need it BTW). What I'm trying to say is shortcuts however handy they may sound at first it also promotes bad thinking. If you cant figure a way to check if a number is odd or even, even the most crappy if (. isin $1) method, then isodd/iseven wont help them any further because after that they'll be stuck on the next "mystery". Most of the current shortcuts actually shortcut something used on a regular basis that would feel repetitive having to repeat all the time. if (N & 1) or if (2 \\ N) is hardly repetitive.
