public class myCalculator
public static void Main()
Console.WriteLine("\n Calculator \n Enter the first number:");
int a = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter second number");
int b = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("choose operation\n 1.product\n 2.Subtract\n 3.Addition\n 4.Division");
int c = Convert.ToInt32(Console.ReadLine());
case 1: String d= Convert.ToString(a*b);
Console.WriteLine("Product:"+ d);
case 2: if(a>b) Console.WriteLine("Difference:"+ Convert.ToString(a-b));
else Console.WriteLine("Difference:"+ Convert.ToString(b-a));
case 3: Console.WriteLine("Sum:"+ Convert.ToString(a-b));
case 4:Console.WriteLine("Division:"+ Convert.ToString(a/b));
default :Console.WriteLine("Enter valid option");
x = Convert.ToDouble(Console.ReadLine());
a = Convert.ToDouble(Console.ReadLine());
z = Math.Log(Math.Pow(x, 2)) / Math.Log(3) + Math.Sqrt(Math.Pow(x,3));
z = Math.Sqrt(x * x + 16) - Math.Exp(2*x);
z = Math.Pow(a, x) + Math.Abs(x * x * x);
Console.WriteLine("Natija z=" + z);