C# Program to Find Area of Rectangle | Using Constructor

C# program to find area of rectangle.

In this article, you will learn how to make a C# program to find area of rectangle.

Example

You should have knowledge of the following topics in C# programming to understand this program:

• C# Oops Concepts
• C# System Library

Source Code

// C# Program to Find Area of Rectangle
using System;

public class W3CW {
    static public void Main (string[] args) {
        Console.WriteLine("Enter the length & width of the rectangle::\n");
        float length=Convert.ToInt32(Console.ReadLine());
        float width=Convert.ToInt32(Console.ReadLine());
        
        // It will calculate the area of a rectangle
        float area = length * width;
        
        // It will print the final output
        Console.WriteLine("Area of the rectangle is: "+area+" units");
    }
}

Run

Output

Explanation

In this given program, we have taken two inputs 9 & 8 length and width of the rectangle from the user via the system console. Then we applied the standard formula to these values to calculate the area.

Then it will return 72 units final output of the above program.

C# Program to Find Area of Rectangle using Constructor

// C# Program to Find Area of Rectangle using Constructor
using System;

public class Rect {
    public float a, b;
    
    // It's the default constructor of the `Rect` class
    public Rect (float x, float y) {
        a=x;
        b=y;
    }
    
    // It will calculate the area of the rectangle
    public float Area() {
        return a * b;
    }
}

public class W3CW {
    // It's the driver function
    static public void Main (string[] args) {
        Console.WriteLine("Enter the length & width of the rectangle::\n");
        float length=Convert.ToInt32(Console.ReadLine());
        float width=Convert.ToInt32(Console.ReadLine());
        
        // It will create the instance of the `Rect` class
        Rect RectObj = new Rect(length, width);
        
        // It will print the final output
        Console.WriteLine("Area of the rectangle is: "+RectObj.Area()+" units");
    }
}

Run