Re: [Haskell-cafe] Very Basic IO question

Joe Olivas wrote:

However, changing 'putStrLn' to 'putStr' does not do what I would expect. The prompt doesn't get displayed until after there is input:

This isn't a Haskell issue per se. The runtime is putting stdout into line-buffered mode, so you need to import System.IO and use hFlush stdout to get it to flush your prompt string out of its buffer. You'd see the same behaviour in C (if using stdio), Python, etc.