ref: 85e6759db8e1fd064efc3cf04716b15e84ca089f dir: /test/pisum.lsp/
(define (pisum) (dotimes (j 500) ((label sumloop (lambda (i sum) (if (> i 10000) sum (sumloop (+ i 1) (+ sum (/ (* i i))))))) 1.0 0.0)))