public int add(int a,int b)
public float add(float a, float b, float c)
public int add(int a, int b, int c, int d)
public static void Main()
Console.WriteLine(obj.add(2,5));
Console.WriteLine(obj.add(2.5f,5.5f,3.5f));
Console.WriteLine(obj.add(1,2,3,4));