[danielf]

Here's my mortgage calculator, using recursion

Spoiler: 

(defun mortgage (balance payment rate months)
(if
(< balance 0)
(print months)
(mortgage (- (+ (* (/ rate 12) balance) balance) payment) payment rate (+ months 1))))

How do you get indentation in the code? My code is indented when I paste it, but I lose indentation in the spoiler tags. Even spaces don't stick...