Haskell in the Real World

Haskell isn't just academic — it's used in finance, tech, and systems programming where correctness matters.

Where Haskell is Used

Building a Real Project

curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh

mkdir my-app && cd my-app
cabal init --non-interactive
cabal build
cabal run

Testing with HSpec

import Test.Hspec

main :: IO ()
main = hspec $ do
    describe "add" $ do
        it "adds two numbers" $ add 2 3 `shouldBe` 5

Tips

• Start with cabal init or stack new.
• Use haskell-language-server for IDE support.
• Hackage and Stackage have thousands of libraries.

🎉 You have completed the Haskell course!