RosettaCodeData/Task/Fibonacci-sequence/Racket/fibonacci-sequence-1.rkt

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Racket
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2015-02-20 00:35:01 -05:00
(define (fib n)
(let loop ((cnt 0) (a 0) (b 1))
(if (= n cnt)
a
(loop (+ cnt 1) b (+ a b)))))