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Task/Ackermann-function/Nit/ackermann-function.nit

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+# Task: Ackermann function
+#
+# A simple straightforward recursive implementation.
+module ackermann_function
+
+fun ack(m, n: Int): Int
+do
+	if m == 0 then return n + 1
+	if n == 0 then return ack(m-1,1)
+	return ack(m-1, ack(m, n-1))
+end
+
+for m in [0..3] do
+	for n in [0..6] do
+		print ack(m,n)
+	end
+	print ""
+end