-- | -- 練習問題 C -- -- >>> :type 'H' -- 'H' :: Char -- >>> :type "H" -- "H" :: [Char] -- >>> :type 2001 -- 2001 :: Num t => t -- >>> :type "2001" -- "2001" :: [Char] -- >>> [1, 2, 3] ++ [3, 2, 1] -- [1,2,3,3,2,1] -- >>> "Hello" ++ " World!" -- "Hello World!" -- >>> [1, 2, 3] ++ [] -- [1,2,3] -- >>> "Hello" ++ " " ++ "World!" -- "Hello World!" module TFwH.Chap01.ExC where