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fn hello() -> felt252 {
'Hello, World!'
}
fn main() {
let greeting: felt252 = hello();
println!("{greeting}");
}Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.
Write a robot simulator.
For want of a horseshoe nail, a kingdom was lost, or so the saying goes. Output the full text of this proverbial rhyme.
Create a custom set type.
Write Rust-like code and generate proofs for program execution - math isn't a barrier.
Produces provable programs, making it possible to compute trustworthy values on untrusted machines.
Cairo compiles down to an ad-hoc assembly engineered specifically for efficient proof generation.
Cairo uses the immutable memory model, improving data integrity and security.
From blockchain gaming to provable ML, Cairo makes building trustless applications possible.
Cairo is a fast-growing language that keeps delivering new and exciting features to its developers.
Every language has its own way of doing things. Cairo is no different. Our mentors will help you learn to think like a Cairo developer and how to write idiomatic code in Cairo. 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 Cairo - they'll help you discover the things you don't know that you don't know.
Learn more about mentoringThe Cairo track on Exercism has 63 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.
See all Cairo exercisesThe best part, it’s 100% free for everyone.