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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.
Given a DNA strand, return its RNA Complement Transcription.
Bob is a lackadaisical teenager. In conversation, his responses are very limited.
Implement the classic method for composing secret messages called a square 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 mentoringThe PureScript track on Exercism has 28 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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