Streak · 7 days+185 XP
7-Day Haskell Exercise
Solve one small Haskell exercise each day using a free online compiler. Check in once a day.
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Coding · Facts & stats · iChallenge network
The Haskell Challenge
Daily facts and stats about the haskell programming language and functional programming, plus real challenges to put them to work.
Today's 3 challenges
What is Haskell's central package repository called?
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Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #42Resets at midnight UTC
Today's round
- 5 questions
- 20s each
- 0 played today
One ranked attempt per day. Practice as much as you like.
Challenges
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Proof+250 XP
Write a Tiny Program
Write a short Haskell program, such as FizzBuzz or a list sorter, and post a link or write-up.
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Proof+250 XP
Recursion Puzzle
Solve a recursion problem in Haskell without loops and post a short write-up of your approach.
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By the numbers
Live counts from HaskellChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days12
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Earned on any arena, shown on your profile everywhere.
First RoundFinish your first daily round.
FlawlessAnswer every question in a round correctly.
LightningA perfect round in under 25 seconds.
On a RollPlay 3 days in a row.
Week WarriorPlay 7 days in a row.
UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
GlobetrotterPlay daily rounds in 25 different arenas.
PolymathPlay daily rounds in 5 different topics.
In the ArenaJoin your first challenge.
FinisherComplete a challenge.
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ChallengerReach level 10.
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Questions
What languages count?
Any language. Challenges score consistency and completion, not syntax.
Is this for beginners?
Yes — quiz rounds start easy and scale with your streak.
How does the daily round work?
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
How is my score calculated?
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Is it free?
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.