Rust Function: Calculate rectangle area

Rust Functions and Control Flow: Exercise-1 with Solution

Write a Rust function that calculates the area of a rectangle given its width and height.

Sample Solution:

Rust Code:

// Define a function named 'calculate_rectangle_area' that takes width and height as parameters and returns the area
fn calculate_rectangle_area(width: f64, height: f64) -> f64 {
    // Calculate the area of the rectangle using the formula: area = width * height
    let area = width * height;
    area // Return the calculated area
}

fn main() {
    let width = 12.0; // Define the width of the rectangle
    let height = 15.0; // Define the height of the rectangle

    // Call the 'calculate_rectangle_area' function with the specified width and height
    let area = calculate_rectangle_area(width, height);

    // Print the calculated area
    println!("Area of the rectangle: {}", area);
}

Output:

Area of the rectangle: 180

Explanation:

Here's a brief explanation of the above Rust code:

• 'fn calculate_rectangle_area(width: f64, height: f64) -> f64 { ... }': This is a function named 'calculate_rectangle_area' that takes two parameters 'width' and 'height', both of type 'f64' (64-bit floating-point numbers), and returns a 'f64' representing the area of the rectangle.
• 'let area = width height;': This line calculates the rectangle area using the formula 'area = width height'.
• 'area': This line returns the calculated area as the result of the function.
• 'fn main() { ... }': This is the program's entry point.
• 'let width = 12.0;' and 'let height = 15.0;': These lines define the rectangle's width and height.
• 'let area = calculate_rectangle_area(width, height);': This line calls the 'calculate_rectangle_area' function with the specified width and height, and stores the result in the variable 'area'.
• 'println!("Area of the rectangle: {}", area);': This line prints the calculated area of the rectangle.

Rust Code Editor:

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