File: Fib.hs

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haskell-doctest-parallel 0.3.1.1-1
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module DosLineEndings.Fib where

-- | Calculate Fibonacci numbers.
--
-- >>> fib 10
-- 55
fib :: Integer -> Integer
fib 0 = 0
fib 1 = 1
fib n = fib (n - 1) + fib (n - 2)