Rust Programming Course for Beginners

• Course Introduction
• Rust Overview
• Initialising the CLI Calculator
• Handling Environment Arguments
• Understanding the nth Method
• Parsing Strings into Floats
• Declaring a Function
• If Statements
• Implicit Returns
• Parsing String into Char
• Formatting Output
• Match Control Flow
• Panicking!
• Building a Release
• Initialising the Image Combiner
• Creating Args Module
• Structs
• Declaring the New Module
• Private vs Public
• Implementing the New Function
• Deriving the Debug Trait
• Using get_nth_arg in Struct
• External Crates
• Decoding Images
• Destructuring Tuples
• Importing Missing Types
• Handling Format Errors with Result
• Enums
• Resizing Images
• FloatingImage Struct
• Buffers with Vecs
• TryInto Conversions
• Deriving Debug for Enums
• Running the Code with Images
• Combining the Image Pixels
• Understanding Borrows and References
• Creating Methods
• Error Propagation
• Saving the New Image
• Using the Image Combiner
• Better Error Handling

fn main() {
    let name="John";
    let age=25;
    let is_student=true;
}

fn main() { let number=5; if number > 0 { println!("The number is positive."); } else if number < 0 { println!("The number is negative."); } else { println!("The number is zero."); } }

Functions are reusable blocks of code that perform specific tasks. They help organize code and make it more manageable. Modules, on the other hand, are collections of related code, including functions, structs, and traits. In Rust, you can define functions using the fn keyword. Here's an example in Rust:

fn greet(name: &str) {
    println!("Hello, {}!", name);
}

fn main() {
    greet("Alice");
    greet("Bob");
}

Here's a simple example of a Rust code project that calculates the factorial of a number:

fn factorial(n: u32) -> u32 {
    if n== 0 {
        1
    } else {
        n * factorial(n - 1)
    }
}

fn main() {
    let number=5;
    let result=factorial(number);
    println!("The factorial of {} is {}.", number, result);
}

In this code, the factorial function takes an unsigned 32-bit integer as input and recursively calculates the factorial. The main function calls factorial with the number 5 and prints the result.

How do I handle errors in Rust?

Here's an example that demonstrates error handling in Rust:

use std::fs::File;
use std::io::Read;

fn read_file_contents(filename: &str) -> Result<String, std::io::Error> {
    let mut file=File::open(filename)?;

    let mut contents=String::new();
    file.read_to_string(&mut contents)?;

    Ok(contents)
}

fn main() {
    let filename="example.txt";
    match read_file_contents(filename) {
        Ok(contents) => println!("File contents: {}", contents),
        Err(error) => println!("Error reading file: {}", error),
    }
}

In this code, the read_file_contents function attempts to read the contents of a file specified by the filename parameter. It returns a Result<String, std::io::Error>, where String represents the file contents on success and std::io::Error represents an error.

Here's an example that demonstrates debugging in Rust:

fn main() {
    let x=5;
    let y=10;

    println!("The value of x is: {}", x);
    println!("The value of y is: {}", y);

    let sum=x + y;
    println!("The sum of x and y is: {}", sum);

    dbg!(sum); // Print the value of `sum` for debugging
}

In this code, the println! macro is used to print the values of x and y. It allows you to see the values during runtime.