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  1. main = print $ myfib 100
  2.  
  3. myfib n = round $ (1 / sq5) * ( (s (+)) - (s (-)))
  4.     where
  5.         s op = ((1 `op` sq5)/2)^(n+1)
  6.         sq5 = sqrt 5
Success #stdin #stdout 0s 6272KB
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573147844013816938496
https://ideone.com/5b75dj
language:
Haskell (ghc 8.4.4)
created:
10 years ago
visibility:
public

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