xxxxxxxxxx
hello = "Hello World"
list = [1, 2, 3]
print(hello) -- "Hello World"
print list -- [1,2,3]
putStrLn hello -- Hello World
putStrLn $ show list -- [1,2,3]
xxxxxxxxxx
-- Use 'putStrLn' to print
ghci> putStrLn "Hello World!"
Hello World!
-- Type of 'putStrLn' function
ghci> :t putStrLn
putStrLn :: String -> IO ()