How to Structure a Rust Project

Structure a Rust project by defining a Cargo.toml manifest, creating a src directory for code, and using modules to organize logic.

cargo new my_project
cd my_project
mkdir -p src/lib src/bin

1. Initialize the project with cargo new my_project to generate the Cargo.toml and src/main.rs.
2. Create a library crate by adding src/lib.rs to define reusable functionality.
3. Create additional binaries by adding files to src/bin/ for multiple entry points.
4. Define modules within src/lib.rs using mod to separate concerns and control scope.
5. Use pub to expose public interfaces and keep implementation details private.

A Rust project is organized like a toolbox where Cargo.toml is the label listing contents, and the src folder holds the actual tools. You split code into separate files called modules to keep related features together, just like organizing a kitchen drawer by utensil type. This structure lets you build one big program or many small tools from the same codebase.