Ackermann function: Difference between revisions
Add ABC
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WRITE: / lv_result.
</syntaxhighlight>
=={{header|ABC}}==
<syntaxhighlight lang="ABC">HOW TO RETURN m ack n:
SELECT:
m=0: RETURN n+1
m>0 AND n=0: RETURN (m-1) ack 1
m>0 AND n>0: RETURN (m-1) ack (m ack (n-1))
FOR m IN {0..3}:
FOR n IN {0..8}:
WRITE (m ack n)>>6
WRITE /</syntaxhighlight>
{{out}}
<pre> 1 2 3 4 5 6 7 8 9
2 3 4 5 6 7 8 9 10
3 5 7 9 11 13 15 17 19
5 13 29 61 125 253 509 1021 2045</pre>
=={{header|Acornsoft Lisp}}==
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