Match overview in Rust - Mini Project: Build & Apply

Match Overview

📖 Scenario: You are building a simple program to describe the weather using Rust's match expression. This helps you choose a message based on the weather condition.

🎯 Goal: Create a Rust program that uses a match expression to print a message about the weather condition.

📋 What You'll Learn

Create a variable called weather with the value "sunny"

Create a variable called message that uses a match expression on weather

Use match arms for "sunny", "rainy", and a default arm

Print the message variable

💡 Why This Matters

🌍 Real World

Using <code>match</code> expressions helps programs make decisions based on different inputs, like choosing messages or actions depending on conditions.

💼 Career

Understanding <code>match</code> is important for Rust programming jobs, especially when handling different cases clearly and safely.

1

Create the weather variable

Create a variable called weather and set it to the string "sunny".

Rust

# Create a variable called weather and set it to "sunny"
// Your code here

Need a hint?

Use let to create a variable and assign the string "sunny".

2

Create the message variable with match

Create a variable called message that uses a match expression on weather. Use arms for "sunny" and "rainy" that return appropriate messages, and a default arm that returns "Unknown weather".

Rust

fn main() {
    let weather = "sunny";
    // Create a variable called message using match on weather
    // Your code here
}

Need a hint?

Use match weather { ... } and include arms for "sunny", "rainy", and a default arm _.

3

Add a print statement to show the message

Add a println! statement to print the message variable.

Rust

fn main() {
    let weather = "sunny";
    let message = match weather {
        "sunny" => "It is a bright and sunny day!",
        "rainy" => "It is raining outside.",
        _ => "Unknown weather",
    };
    // Print the message variable
    // Your code here
}

Need a hint?

Use println!("{}", message); to display the message.

4

Run the program and see the output

Run the program to see the printed message about the weather.

Rust

fn main() {
    let weather = "sunny";
    let message = match weather {
        "sunny" => "It is a bright and sunny day!",
        "rainy" => "It is raining outside.",
        _ => "Unknown weather",
    };
    println!("{}", message);
}

// Run the program to see the output

Need a hint?

Check the console output after running the program.