Scalar data types in Rust - Mini Project: Build & Apply

Understanding Scalar Data Types in Rust

📖 Scenario: You are learning Rust programming and want to understand how to use scalar data types. Scalars are the simplest types that hold a single value, like numbers and characters.

🎯 Goal: Build a small Rust program that declares variables of different scalar types and prints their values.

📋 What You'll Learn

Declare variables with scalar types: i32, f64, char, and bool

Assign exact values to these variables

Print the values of these variables

💡 Why This Matters

🌍 Real World

Scalar data types are the building blocks for storing simple values like counts, measurements, letters, and true/false flags in any Rust program.

💼 Career

Understanding scalar types is essential for writing safe and efficient Rust code, which is valuable in systems programming, embedded development, and performance-critical applications.

1

Declare an integer variable

Create a variable called my_integer of type i32 and assign it the value 42.

Rust

# Your code here

Need a hint?

Use let to declare a variable and specify the type with a colon.

2

Add a floating-point variable

Add a variable called my_float of type f64 and assign it the value 3.14 below the integer variable.

Rust

fn main() {
    let my_integer: i32 = 42;
    # Your code here
}

Need a hint?

Remember to use let and specify the type f64 for floating-point numbers.

3

Add a character and a boolean variable

Add two variables: my_char of type char with value 'R', and my_bool of type bool with value true below the previous variables.

Rust

fn main() {
    let my_integer: i32 = 42;
    let my_float: f64 = 3.14;
    # Your code here
}

Need a hint?

Use single quotes for char values and true or false for bool.

4

Print all variables

Use println! to print the values of my_integer, my_float, my_char, and my_bool each on its own line.

Rust

fn main() {
    let my_integer: i32 = 42;
    let my_float: f64 = 3.14;
    let my_char: char = 'R';
    let my_bool: bool = true;
    # Your code here
}

Need a hint?

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