What is Rust

Introduction

Rust is a programming language that helps you write fast and safe programs. It stops many common mistakes before your program runs.

When you want to build fast software like games or tools.

When you need your program to be safe from crashes or bugs.

When you want to work on system-level code like operating systems.

When you want to write code that works well with other languages.

When you want to learn a modern language that helps you think clearly about memory and safety.

Syntax

Rust

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

This is the basic way to write a program in Rust.

fn main() defines the starting point of the program.

Examples

This prints a simple greeting to the screen.

Rust

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

This shows how to create a function that adds two numbers and prints the result.

Rust

fn add(a: i32, b: i32) -> i32 {
    a + b
}

fn main() {
    let sum = add(5, 3);
    println!("Sum is {}", sum);
}

Sample Program

This program prints a welcome message to the screen.

Rust

fn main() {
    println!("Welcome to Rust!");
}

Important Notes

Rust focuses on safety without slowing down your program.

It uses a system called 'ownership' to manage memory automatically.

Rust programs are compiled, which means they turn into fast machine code.

Summary

Rust is a fast and safe programming language.

It helps prevent bugs before the program runs.

Rust is great for building reliable and efficient software.