public static void Main()
Console.WriteLine("Hello World");
Console.WriteLine(3==3) ;
Console.WriteLine(4==9) ;
Console.WriteLine(x==y) ;
Console.WriteLine(3!=3) ;
Console.WriteLine(4!=9) ;
Console.WriteLine(x!=y) ;
Console.WriteLine(3>=3) ;
Console.WriteLine(4>=9) ;
Console.WriteLine(x>=y) ;