RosettaCodeData/Task/Mutual-recursion/SNOBOL4/mutual-recursion.sno

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define('f(n)') :(f_end)
f f = eq(n,0) 1 :s(return)
f = n - m(f(n - 1)) :(return)
f_end
define('m(n)') :(m_end)
m m = eq(n,0) 0 :s(return)
m = n - f(m(n - 1)) :(return)
m_end
* # Test and display
L1 s1 = s1 m(i) ' ' ; s2 = s2 f(i) ' '
i = le(i,25) i + 1 :s(L1)
output = 'M: ' s1; output = 'F: ' s2
end