Fibonacci sequence: Difference between revisions
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<lang lean>def fib1 : ℕ → ℕ |
<lang lean>def fib1 : ℕ → ℕ |
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| 0 := 0 |
| 0 := 0 |
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| 1 := 1 |
| 1 := 1 |
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| (n + 2) := fib1 n + fib1 (n + 1) |
| (n + 2) := fib1 n + fib1 (n + 1) |
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