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About PureScript

module HelloWorld where

import Prelude
import Data.Maybe (Maybe(..))

helloWorld :: Maybe String -> String
helloWorld Nothing = "Hello, World!"
helloWorld (Just x) =
  "Hello, " <> x <> "!"

31 coding exercises for PureScript on Exercism. From Largest Series Product to Bob.

Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.

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Key Features of PureScript


Compile to JavaScript

Allowing you to use PureScript anywhere JavaScript is used.


Use functional techniques such as row polymorphism, algebraic data types, and type classes.


PureScript has a rich ecosystem of tools and extensions for most editors.

Statically Typed

PureScript is statically typed, with a powerful type system inspired by Haskell.

Active Community

Active community of developers and users.


PureScript has lightweight syntax which allows for expressive code

Get mentored the PureScript way

Every language has its own way of doing things. PureScript is no different. Our mentors will help you learn to think like a PureScript developer and how to write idiomatic code in PureScript. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in PureScript - they'll help you discover the things you don't know that you don't know.

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Community-sourced PureScript exercises

The PureScript track on Exercism has 31 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.

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