Rust

🦀 Rust Programming Learning Tutorial

This tutorial provides a quick start guide to installing Rust and running your first Rust project using both rustc and cargo.

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📘 Lessons

Lesson	Description
1️⃣	Hello World – Your first Rust program with fn main() and println!()
2️⃣	My Calculator – A modular Rust CLI calculator using lib.rs, main.rs, and bin/*.rs

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🛠️ Installation (Linux / macOS)

Open your terminal and run the following:

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

Follow the prompts. Then activate Rust for your current session:

source $HOME/.cargo/env

Verify installation:

rustc --version
cargo --version
echo $PATH

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🚀 Your First Rust Project

Option A: Using cargo

Create a new project:

cargo new get-dependencies
cd get-dependencies

Build the project:

cargo build    # Compiles and creates an executable
cargo check    # Checks code without building an executable

Edit the default source file:

cd src

Open main.rs and add:

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

Run your code:

cargo run

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Option B: Using rustc (Direct Compilation)

If you want to manually compile without cargo:

1. Create a file named main.rs:

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

1. Compile and run it:

rustc main.rs
./main

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📦 Creating Another Project (e.g., my_game)

To create a new Rust project called my_game, run:

cargo new my_game
cd my_game
cargo run

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✅ Summary

Command	Description
cargo new <name>	Create a new Rust project
cargo build	Compile the project
cargo check	Check code for errors without building
cargo run	Compile and run the project
rustc main.rs	Compile a standalone Rust file
./main	Run compiled Rust binary

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