Playground
Free-form Rust sandbox powered by the official Rust Playground compiler. Great for experimenting between lessons. Uses the stable channel and the 2021 edition — std only (no crates.io deps here).
Free playgroundRust 2021
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Output
Press Run to compile and execute.
Shortcuts
Edit freely, hit Run, read compiler errors — they teach ownership better than any blog.
Limits
Timeouts and no network. Heavy Monte Carlo may be slow; reduce path counts online.
Local pro setup
Install rustup, then add serde, rayon, ndarray, polars for real quant workloads.