(module c3_value_let
  (fn iterate
    (doc "xnew is a Float let-binder used in cond and both branches")
    (type (fn-type (params (own (con Float)) (own (con Float))) (ret (own (con Float)))))
    (params x tol)
    (body
      (let xnew (app / x 2.0)
        (if (app float_lt (app - xnew x) tol)
          xnew
          xnew)))))