4.1 Compiling with Rustc
The Rust compiler, rustc, is the fundamental tool for compiling Rust programs. To compile a single Rust source file, run this command in your terminal:
rustc main.rs
This command compiles the file main.rs into an executable, which you can run directly. Although using rustc alone works for simple projects, it becomes unwieldy for larger codebases with multiple files or external dependencies. That’s where Cargo comes in.