Question: That is a pi calculating program in scheme. Is there a way to get rid of if and put cond there? (define (pi err) (let

That is a pi calculating program in scheme. Is there a way to get rid of "if" and put "cond" there?

(define (pi err) (let loop ([n 0] [prev +nan.0] [cur 0.0]) (cond ((< (abs (- cur prev)) (/ err4.0)) (* 4.0 prev)) (else(loop (add1 n) cur ((if (even? n) + -) cur (/ 1.0 (+ 1.0 n n))))))))

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