ref: 2d5cb51afb76b68d7475b7c4033c72000f3dcca7 dir: /tests/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)))