This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
echo = do | |
str <- getLine | |
if str == "quit" | |
then do | |
putStrLn "Do you really want to quit? (yes/no)" | |
ans <- getLine | |
if ans == "yes" | |
then return () | |
else echo | |
else do |