RosettaCodeData/Task/Fibonacci-sequence/Tailspin/fibonacci-sequence-4.tailspin

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2023-07-01 11:58:00 -04:00
templates nthFibonacci
{ N: ($)"1", n0: 0"1", n1: 1"1" } -> #
when <{ N: <=0"1"> }> do
$.n0 !
when <{ N: <1"1"..>}> do
{ N: $.N - 1"1", n0: $.n1, n1: $.n0 + $.n1} -> #
otherwise
{ N: $.N + 1"1", n1: $.n0, n0: $.n1 - $.n0} -> #
end nthFibonacci
8 -> nthFibonacci -> '$;
' -> !OUT::write
-5 -> nthFibonacci -> '$;
' -> !OUT::write
-6 -> nthFibonacci -> '$;
' -> !OUT::write