Series: Angelia
haskell
7 lines
· Updated 2026-02-03
Fibonacci.hs
Angelia/Haskell/Fibonacci.hs
module Fibonacci where
fibonacci :: Integer -> Integer
fibonacci n
| n < 0 = error "fibonacci: negative input"
| n == 0 = 0
| n == 1 = 1
| otherwise = fibonacci (n - 1) + fibonacci (n - 2)Related articles
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