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Sergii Pchelintsev jalkoby
mvidaurre
/ fibo_tail_recursion.rb
Created
April 17, 2014 19:30
Calculate the nth Fibonacci number, f(n). Using invariants for https://github.com/RayHightower/fibonacci
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| # Calculate the nth Fibonacci number, f(n). Using invariants | |
| def fibo_tr(n, acc1, acc2) | |
| if n == 0 | |
| 0 | |
| elsif n < 2 | |
| acc2 | |
| else | |
| return fibo_tr(n - 1, acc2, acc2 + acc1) | |
| end | |
| end |