Streak · 7 days+185 XP
7-Day Rust Exercise Streak
Solve one small Rust exercise each day using free online practice problems. Check in with what you learned.
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Coding · Facts & stats · iChallenge network
The Rust Challenge
Daily facts and stats about the Rust programming language, plus real challenges to put them to work.
Warm-up questionNot ranked · tap an answer
In Rust, what are packages of reusable code called?
Rust libraries and programs are distributed as crates.
Level1Rookie
XPPlay a round to earn XP
Streak0days
LeagueBronzeweekly
Daily #2Resets 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
Hello, Cargo
Create a new project with Cargo, make it print a message, and post a link or a short write-up of the steps.
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Proof+250 XP
Explain Ownership Simply
Write a short, plain-language explanation of ownership and borrowing in Rust. Post the write-up.
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Streak · 14 days+220 XP
14-Day Read the Rust Book
Read one section of the free official Rust book each day. Check in with the section you finished.
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By the numbers
Live counts from RustChallenge.com. All arena stats →
Facts in the pack12
Visitors, 30 days28
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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.
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UnbreakablePlay 30 days in a row.
ExplorerPlay daily rounds in 5 different arenas.
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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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Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
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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.