10 Most Important Things You Should Learn in Lean 4

The guide introduces 10 core Lean 4 ideas beginners need for formal verification.

It highlights functions, types, pattern matching, recursion, tactics, and inductive types as the main building blocks.

Lean 4 matters because it combines programming and proving, letting both code and mathematical claims be verified.

The article frames Lean 4 as a practical path for writing correct software and trusted proofs.