progs/fun/fact.fun
author Christian Urban <christian dot urban at kcl dot ac dot uk>
Mon, 20 Jul 2020 10:06:43 +0100
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def fact(n) =
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  (if n == 0 then 1 else n * fact(n - 1));
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def facT(n, acc) =
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  if n == 0 then acc else facT(n - 1, n * acc);
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def facTi(n) = facT(n, 1);
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//fact(10)
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//facTi(10)
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write(facTi(6))
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// a simple factorial program
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// (including a tail recursive version)