20 lines
440 B
Haskell
20 lines
440 B
Haskell
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import Data.Maybe
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import Text.Read (readMaybe)
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getListFromString :: String -> Maybe [Integer]
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getListFromString str = readMaybe $ "[" ++ str ++ "]"
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askUser :: IO [Integer]
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askUser = do
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putStrLn "Enter a list of numbers (separated by comma):"
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input <- getLine
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let maybeList = getListFromString input
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case maybeList of
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Just l -> return l
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Nothing -> askUser
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main :: IO ()
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main = do
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list <- askUser
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print $ sum list
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