Description

Contents:

1. What is a Module in Rust?

2. Declaring and Using Modules (mod, use)

3. Navigating File Structure and mod.rs

4. Crates: Binary vs Library

5. How to Create and Publish Your Own Crate

6. Using External Crates from crates.io

7. Adding Dependencies via Cargo.toml

8. Visibility (pub, private) Rules

9. Re-exporting for Cleaner APIs

10. Hands-On: Build a Modular Calculator or CLI Tool