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module HelloWorld where
import Prelude
import Data.Maybe (Maybe(..))
helloWorld :: Maybe String -> String
helloWorld Nothing = "Hello, World!"
helloWorld (Just x) =
"Hello, " <> x <> "!"
Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.
Determine whether a given year is a leap year.
Implement the `accumulate` operation, which, given a collection and an operation to perform on each element of the collection, returns a new collection containing the result of applying that operation to each element of the input collection.
Make sure the brackets and braces all match.
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.
PureScript is statically typed, with a powerful type system inspired by Haskell.
Active community of developers and users.
PureScript has lightweight syntax which allows for expressive code
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.
Learn more about mentoring
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.
See all PureScript exercises
The best part, it’s 100% free for everyone.