8 lines
174 B
Io
8 lines
174 B
Io
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fib := method(x,
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if(x < 0, Exception raise("Negative argument not allowed!"))
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fib2 := method(n,
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if(n < 2, n, fib2(n-1) + fib2(n-2))
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)
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fib2(x floor)
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)
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