using System;

class cal

{

  public int add(int a,int b)

  {

      return (a+b);

  }

    public float add(float a, float b, float c)

    {                                               //a class can have more than one method of same name provided that there arumentlist or parameter are diffrent is called method overloading

        return (a+b);

    }

    public int add(int a, int b, int c, int d)

    {

        return a*b*c*d;

    }

}

public class Program

{

    public static void Main()

    {

        cal obj=new cal();

        Console.WriteLine(obj.add(2,5));

        Console.WriteLine(obj.add(2.5f,5.5f,3.5f));

        Console.WriteLine(obj.add(1,2,3,4));

    }

}

​