20 lines
425 B
Haskell
20 lines
425 B
Haskell
leftFact :: [Integer]
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leftFact = scanl (+) 0 fact
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fact :: [Integer]
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fact = scanl (*) 1 [1 ..]
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main :: IO ()
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main =
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mapM_
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putStrLn
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[ "0 ~ 10:"
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, show $ (leftFact !!) <$> [0 .. 10]
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, ""
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, "20 ~ 110 by tens:"
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, unlines $ show . (leftFact !!) <$> [20,30 .. 110]
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, ""
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, "length of 1,000 ~ 10,000 by thousands:"
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, show $ length . show . (leftFact !!) <$> [1000,2000 .. 10000]
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, ""
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]
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