Lesson 1: Getting Started

Installation

To install Rust:

• Linux/macOS: Run curl --proto '=https' --tlsv1.2 https://sh.rustup.rs -sSf | sh in the terminal. You may need to enter your password. If you encounter linker errors, install a C compiler (e.g., GCC/Clang on Linux, Xcode command-line tools on macOS).
• Windows: Visit https://www.rust-lang.org/tools/install and follow the instructions. Install Visual Studio if prompted for a linker and libraries.

Verify installation with rustc --version. Update with rustup update; uninstall with rustup self uninstall.

Hello, World!

To create and run a simple "Hello, world!" program:

1. Create a project directory (e.g., mkdir ~/projects/hello_world on Linux/macOS).
2. Create main.rs with:

fn main() {
    println!("Hello, world!");
}

3. Compile: rustc main.rs.
4. Run: ./main (Linux/macOS) or .\main.exe (Windows). Output: Hello, world!

Introduction to Cargo

Cargo is Rust's build system and package manager. Verify with cargo --version.

Create a project: cargo new hello_cargo. This generates Cargo.toml and src/main.rs.

Build: cargo build (executable in target/debug/).

Run: cargo run (builds and runs in one step).

Check compilation: cargo check. For release: cargo build --release.

You Try

Edit the code below to print a different message, then click Run to compile and execute it.

fn main() {
    println!("Hello, world!");
}