Hi everybody,
 I was just trying to implement a simple length of a list in core.logic
(basically solving the 99-problems-in-prolog). I am not able to find a way
to increment values.. Can somebody help me with this... I would like some
thing like the following to work..

(defnu lengtho [l n]
  ([[] 0])
  ([[_ . rst] _] (fresh [n1]
                        (lengtho rst n1)
                        (== n (+ n1 1))))

but I can't do "(== n (+ n1 1))" can somebody help me? Even if you tell me
as to how I can covert the regular count function so that I can use it as a
goal.. that would work too.
Thanks,
Sunil.

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