RosettaCodeData/Task/Ackermann-function/Processing/ackermann-function

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int ackermann(int m, int n) {
if (m == 0)
return n + 1;
else if (m > 0 && n == 0)
return ackermann(m - 1, 1);
else
return ackermann( m - 1, ackermann(m, n - 1) );
}
// Call function to produce output:
// the first 4x7 Ackermann numbers
void setup() {
for (int m=0; m<4; m++) {
for (int n=0; n<7; n++) {
print(ackermann(m, n), " ");
}
println();
}
}