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About C

82 coding exercises for C on Exercism. From Nth Prime to Sum of Multiples.

Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.

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Key Features of C



C is portable and can run on almost any platform and chipset.

General purpose

Can be used for a wide variety of workloads from IoT to game engines.


Consistently rated as one of the highest performing languages for energy and time.


The C standard values stability and backwards compatibility, C programs can run for decades.


Allows both lower and higher level functionality, making it very powerful.

Widely used

Consistently one of the most popular languages for everything from operating systems to firmware

Get mentored the C way

Every language has its own way of doing things. C is no different. Our mentors will help you learn to think like a C developer and how to write idiomatic code in C. 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 C - they'll help you discover the things you don't know that you don't know.

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Community-sourced C exercises

The C track on Exercism has 82 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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