Relational operators in Rust - Mini Project: Build & Apply

Relational Operators in Rust

📖 Scenario: You are building a simple program to compare ages of two friends to see who is older.

🎯 Goal: Learn how to use relational operators in Rust to compare numbers and print the results.

📋 What You'll Learn

Create variables with exact values

Use relational operators: ==, !=, <, <=, >, >=

Print boolean results of comparisons

💡 Why This Matters

🌍 Real World

Comparing values is common in programs that make decisions, like checking user age for access or comparing scores in games.

💼 Career

Understanding relational operators is essential for any programming job because they help control the flow of programs and make decisions.

1

Create age variables

Create two variables called alice_age and bob_age with values 25 and 30 respectively.

Rust

# Create variables alice_age and bob_age with values 25 and 30
// Your code here

Need a hint?

Use let to create variables and assign the exact numbers.

2

Add relational comparisons

Add variables to store the results of these comparisons: alice_age == bob_age in is_equal, alice_age < bob_age in is_alice_younger, and alice_age >= bob_age in is_alice_older_or_equal.

Rust

fn main() {
    let alice_age = 25;
    let bob_age = 30;
    // Create is_equal, is_alice_younger, and is_alice_older_or_equal variables
    // Your code here
}

Need a hint?

Use ==, <, and >= operators to compare the ages and store the results in variables.

3

Add more relational comparisons

Add two more variables: is_not_equal for alice_age != bob_age and is_bob_younger_or_equal for bob_age <= alice_age.

Rust

fn main() {
    let alice_age = 25;
    let bob_age = 30;
    let is_equal = alice_age == bob_age;
    let is_alice_younger = alice_age = bob_age;
    // Create is_not_equal and is_bob_younger_or_equal variables
    // Your code here
}

Need a hint?

Use != and <= operators for these comparisons.

4

Print all comparison results

Print the values of is_equal, is_alice_younger, is_alice_older_or_equal, is_not_equal, and is_bob_younger_or_equal each on a new line using println!.

Rust

fn main() {
    let alice_age = 25;
    let bob_age = 30;
    let is_equal = alice_age == bob_age;
    let is_alice_younger = alice_age = bob_age;
    let is_not_equal = alice_age != bob_age;
    let is_bob_younger_or_equal = bob_age <= alice_age;
    // Print all variables below
    // Your code here
}

Need a hint?

Use println!("{}", variable); to print each boolean value on its own line.