Using Global Variables

... in a Library is worse than murder.

Satan himself will arise from the depths of Oblivion to tear apart your soul for that.

THIS THREAD HAS BEEN CLOSED AND REPLACED WITH THE FOLLOWING:
    Subject: Replacing all cars with cdrs
    Name:
    Email: mailto:sage
    Message: (let loop ((xs '(1 2 3 4 5)) (r '())) (if (null? xs) r (loop (car xs) (+ (car xs) (car xs)))))
             car: expects argument of type <pair>; given 1
             It doesn't work.