chibi-scheme/tests/snow/repo2/leonardo/fibonacci.scm
2015-04-09 01:16:52 +09:00

5 lines
106 B
Scheme

(define (fib n)
(let lp ((n n) (a 1) (b 1))
(if (< n 2)
a
(lp (- n 1) (+ a b) a))))