Example: Rectangle Area and Perimeter Calculator in C++

// Rectangle Area and Perimeter Calculator
#include <iostream> // Required for input/output operations

int main() {
    // Step 1: Declare variables to store length, width, area, and perimeter
    // Using 'double' for precision to handle decimal values
    double length;
    double width;
    double area;
    double perimeter;

    // Step 2: Prompt the user to enter the length
    std::cout << "Enter the length of the rectangle: ";
    std::cin >> length; // Read the length from user input

    // Step 3: Prompt the user to enter the width
    std::cout << "Enter the width of the rectangle: ";
    std::cin >> width; // Read the width from user input

    // Step 4: Calculate the area using the formula: Area = Length * Width
    area = length * width;

    // Step 5: Calculate the perimeter using the formula: Perimeter = 2 * (Length + Width)
    perimeter = 2 * (length + width);

    // Step 6: Display the calculated area
    std::cout << "Area of the rectangle: " << area << std::endl;

    // Step 7: Display the calculated perimeter
    std::cout << "Perimeter of the rectangle: " << perimeter << std::endl;

    return 0; // Indicate successful execution
}