public static int Add(int num1, int num2)
public static int sub(int num1, int num2)
public static int mul(int num1, int num2)
public static int div(int num1, int num2)
static void Main(string[] args)
int result1 = Calculator.Add(1,2);
int result2 = Calculator.sub(5,1);
int result3 = Calculator.mul(4,3);
int result4 = Calculator.div(8,2);
Console.WriteLine("Addition :" + result1);
Console.WriteLine("Subtraction :" + result2);
Console.WriteLine("Multiplication :" + result3);
Console.WriteLine("Division :" + result4);