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Hello World
The classical introductory exercise. Just say "Hello, World!".
"Hello, World!" is the traditional first program for beginning programming in a new language or environment.
The objectives are simple:
- Write a function that returns the string "Hello, World!".
- Run the test suite and make sure that it succeeds.
- Submit your solution and check it at the website.
If everything goes well, you will be ready to fetch your first real exercise.
Hints
To complete this exercise, you need to implement the hello function.
You will find the type signature for hello already in place,
but it is up to you to define the function.
Getting Started
For installation and learning resources, refer to the exercism help page.
Running the tests
To run the test suite, execute the following command:
stack test
If you get an error message like this...
No .cabal file found in directory
You are probably running an old stack version and need to upgrade it.
Otherwise, if you get an error message like this...
No compiler found, expected minor version match with...
Try running "stack setup" to install the correct GHC...
Just do as it says and it will download and install the correct compiler version:
stack setup
Running GHCi
If you want to play with your solution in GHCi, just run the command:
stack ghci
Feedback, Issues, Pull Requests
The exercism/haskell repository on GitHub is the home for all of the Haskell exercises.
If you have feedback about an exercise, or want to help implementing a new one, head over there and create an issue. We'll do our best to help you!
Source
This is an exercise to introduce users to using Exercism http://en.wikipedia.org/wiki/%22Hello,_world!%22_program
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.