Integer types in Rust - Mini Project: Build & Apply

Integer types

📖 Scenario: You are working on a simple program that stores and displays different integer values representing ages and counts in a small shop.

🎯 Goal: Learn how to create variables with different integer types in Rust and print their values.

📋 What You'll Learn

Create variables with specific integer types

Assign exact integer values to these variables

Print the values to the console

💡 Why This Matters

🌍 Real World

Integer types are used in programs to store numbers like ages, counts, and totals with different size limits and signs.

💼 Career

Understanding integer types and casting is important for writing safe and efficient code in systems programming and many software development jobs.

1

Create integer variables

Create a variable called age of type u8 and set it to 30. Also create a variable called count of type i16 and set it to -15.

Rust

// Create a variable called age of type u8 and set it to 30
// Create a variable called count of type i16 and set it to -15

Need a hint?

Use let keyword to create variables with explicit types like u8 and i16.

2

Add another integer variable

Add a variable called total of type i32 and set it to 1000.

Rust

fn main() {
    let age: u8 = 30;
    let count: i16 = -15;
    // Add a variable called total of type i32 and set it to 1000
}

Need a hint?

Use let total: i32 = 1000; to create the variable.

3

Use variables in a calculation

Create a variable called net of type i32 that adds total and count.

Rust

fn main() {
    let age: u8 = 30;
    let count: i16 = -15;
    let total: i32 = 1000;
    // Create a variable net of type i32 that adds total and count
}

Need a hint?

Cast count to i32 before adding to total.

4

Print the values

Print the values of age, count, total, and net using println! with labels.

Rust

fn main() {
    let age: u8 = 30;
    let count: i16 = -15;
    let total: i32 = 1000;
    let net: i32 = total + count as i32;
    // Print age, count, total, and net with labels
}

Need a hint?

Use println!("Label: {}", variable); to print each variable with a label.