Method overloading in C Sharp (C#) - Mini Project: Build & Apply

Method Overloading in C#

📖 Scenario: You are creating a simple calculator program that can add numbers. Sometimes you want to add two numbers, and other times you want to add three numbers. To do this, you will use method overloading.

🎯 Goal: Build a C# program that uses method overloading to add two or three numbers using methods with the same name but different parameters.

📋 What You'll Learn

Create a class called Calculator

Inside Calculator, create two methods named Add

One Add method should take two int parameters

The other Add method should take three int parameters

Both methods should return the sum of their parameters

Create an instance of Calculator and call both Add methods

Print the results of both method calls

💡 Why This Matters

🌍 Real World

Method overloading is used in many programs to simplify code and handle different input types or numbers without changing method names.

💼 Career

Understanding method overloading is important for writing clean, reusable code in C# and is commonly asked in programming interviews.

1

Create the Calculator class with the first Add method

Create a class called Calculator with a method named Add that takes two int parameters named a and b and returns their sum.

C Sharp (C#)

public class Calculator
{
    // Your code here
}

Need a hint?

Define a class and inside it, write a method named Add with two integer parameters that returns their sum.

2

Add the second Add method with three parameters

Inside the Calculator class, add another method named Add that takes three int parameters named a, b, and c and returns their sum.

C Sharp (C#)

public class Calculator
{
    public int Add(int a, int b)
    {
        return a + b;
    }

    // Your code here
}

Need a hint?

Add a second method with the same name but three parameters to add three numbers.

3

Create a Main method and call both Add methods

Create a Main method inside a Program class. Inside Main, create an instance of Calculator named calc. Call calc.Add(5, 10) and store the result in sumTwo. Call calc.Add(1, 2, 3) and store the result in sumThree.

C Sharp (C#)

public class Calculator
{
    public int Add(int a, int b)
    {
        return a + b;
    }

    public int Add(int a, int b, int c)
    {
        return a + b + c;
    }
}

public class Program
{
    public static void Main()
    {
        // Your code here
    }
}

Need a hint?

Create a Program class with a Main method. Inside, make a Calculator object and call both Add methods.

4

Print the results of both Add method calls

Inside the Main method, add two Console.WriteLine statements to print sumTwo and sumThree.

C Sharp (C#)

public class Calculator
{
    public int Add(int a, int b)
    {
        return a + b;
    }

    public int Add(int a, int b, int c)
    {
        return a + b + c;
    }
}

public class Program
{
    public static void Main()
    {
        Calculator calc = new Calculator();
        int sumTwo = calc.Add(5, 10);
        int sumThree = calc.Add(1, 2, 3);
        // Your code here
    }
}

Need a hint?

Use Console.WriteLine to print the values of sumTwo and sumThree.