CSharp C# Method Overloading with Practical Example and Coding Challenge / Coding Excercise

I've linked my YouTube video below, where I explain method overloading in C# with a practical example and a fun coding challenge at the end. Below the video, you'll find the actual code featured in the tutorial.

Try solving the coding challenge yourself before checking out the solution provided at the end of this blog - it’s a fantastic way to test your understanding and sharpen your skills! Happy coding! 😊

Actual code featured in the tutorial

using System;

namespace MethodOverLoading
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Log log = new Log();
            log.DisplayLog("Welcome to this program.");
            log.DisplayLog("You have successfully created the file on ", DateTime.Now);
            log.DisplayLog("Requires user authentication", 401);
        }
    }

    public class Log
    {
        public void DisplayLog(string message)
        {
            Console.WriteLine(message);
        }
        public void DisplayLog(string message, DateTime dateAndTime)
        {
            Console.WriteLine($"{message}, {dateAndTime}");
        }
        public void DisplayLog(string error, int errorCode)
        {
            Console.WriteLine($"{error}, error code: {errorCode}");
        }
    }
}

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Method Overloading coding challenge solution

Below is the solution to the coding challenge featured in the video. In this example, I’ve used the double data type for the square and rectangle area parameters, and int for the circle area. However, feel free to use any data types you prefer—as long as the method signatures are different, your solution will work perfectly for this challenge.

using System;

namespace MethodOverLoadingExcercise
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Area(3.0);
            Area(1.5, 4);
            Area(4);
        }

        //area of a square
        public static double Area(double length)
        {
            //if decimal, then round to 2 decimal places
            double output = Math.Round(length * length, 2);

            Console.WriteLine($"Area of square: {output}");

            return output;
        }

        //area of a rectangle
        public static double Area(double length1, double length2)
        {
            double output = Math.Round(length1 * length2, 2);

            Console.WriteLine($"Area of rectangle: {output}");

            return output;
        }

        /* area of a circle
        We use an integer parameter for the radius to make this 
        method's signature unique compared to the square's area method. 
        This is important because both shapes involve a single numeric input.
         */
        public static double Area(int radius)
        {
            //const means variable is a constant
            const double pi = Math.PI;

            //Area of a circle = pi * r * r, rounded to 2 decimals
            double output = Math.Round(pi * radius * radius, 2);

            Console.WriteLine($"Area of circle: {output}");

            return output;
        }
    }
    
}