Setting Up and Hello World

Getting started with Rust is straightforward thanks to rustup, the official Rust toolchain installer. This lesson covers installation, your first program, and an introduction to Cargo.

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Installing Rust with rustup

The recommended way to install Rust is via rustup, which manages Rust versions and associated tools:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

After installation, verify:

rustc --version
cargo --version

What rustup Installs

Component	Description
rustc	The Rust compiler
cargo	Build system and package manager
rustfmt	Code formatter
clippy	Linter
rust-docs	Offline documentation
rust-std	Standard library

Managing Toolchains

# Update Rust to the latest stable version
rustup update

# Install the nightly toolchain
rustup install nightly

# Set the default toolchain
rustup default stable

# Show installed toolchains
rustup show

Rust has three release channels: stable (every 6 weeks), beta, and nightly.

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Your First Rust Program

Create a file called main.rs:

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

Compile and run it: