public static void Main()
Console.WriteLine("Summation of {0} and {1} is {2}",num1,num2,num1+num2);
Console.WriteLine("Subtraction of {0} and {1} is {2}",num1,num2,num1-num2);
Console.WriteLine("Multiplication of {0} and {1} is {2}",num1,num2,num1*num2);
Console.WriteLine("Division of {0} and {1} is {2:f}",num1,num2,(float)num1/num2);