Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

rustdoc

Rust's tool that turns doc comments into HTML pages.

rustdoc, run by cargo doc, builds HTML documentation into target/doc/.

Examples

cargo doc runs rustdoc and writes HTML to target/doc/, such as target/doc/fines/fn.late_fee.html; cargo doc --open opens it in a browser.