Tutorialtheorem provingdependent typesleanfunctional programming
Lean Introduces Verified Fizzbuzz Programming Tutorial
|
6.1
This post introduces Lean as both a programming language and interactive proof assistant, and demonstrates implementing and verifying the Fizzbuzz problem using Lean's pure functional style and dependent typing. It contrasts Lean with Dafny, explains design trade-offs (no mutable state, proof-driven verification, fewer SMT timeouts), presents code examples (fb_one, fizzbuzz), and promises readers enough background to verify simple programs by the end of the series.
Scoring Rationale
Practical, hands-on tutorial with executable Lean proofs; limited novelty and single-author blog restricts broader impact.
Practice interview problems based on real data
1,500+ SQL & Python problems across 15 industry datasets — the exact type of data you work with.
Try 250 free problems
