> i think what aknibbs means, lol, is:
> random number from 0 - N, then SUBTRACT
> (nothing left for user to figure out)
there is for them to get from -n to 0 to +n
I wasn't sure if they were having a brain **** how to get a negative number out of the generator.
*Edit* When i first posted my answer I missed that they wanted from -n to +n so in hindsight my suggestion was not a good one at all - which leaves even more for the user to figure out.