What are exceptions in Haskell?

What are exceptions in Haskell?

In Haskell, exceptions are used to handle errors and unexpected situations in a controlled way.

How do I throw an exception in Haskell?

You can throw an exception using the Control.Exception module, specifically the throw function.

Can you show me an example of using exceptions?

Sure! Here's a simple example:

import Control.Exception

main :: IO ()
main = do
    result <- try (evaluate (1 `div` 0)) :: IO (Either SomeException Int)
    case result of
        Left ex  -> putStrLn $ "Caught exception: " ++ show ex
        Right val -> print val

What about handling multiple exceptions?

You can use catch to handle specific exceptions or handle for a more general approach.