using System;

namespace CSharpMultiplication
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                //Declare two integer variables
                int valueOne;
                int valueTwo;

                // declare a const variable to hold the value that each number will be
                // multiplied by
                //Note: "const" specifies that the value of the field or the local variable cannot be modified. 
                const int MULTIPLIER = 12;

                //Prompt the user to enter a number between 1 and 12
                Console.WriteLine("Please enter a number between 1 and 12");

                //Set the entered number to the variable 'valueOne'
                valueOne = int.Parse(Console.ReadLine());


                //Check if the Number is between 1 AND 12:
                //Use && operator to determine whether the number entered

                //Note: The conditional-AND operator (&&) performs a 
                //logical-AND of its bool operands, but only evaluates its second operand if necessary.
                if (valueOne > 0 && valueOne < 13)
                {
                    //The number entered is between 1 and 12. The if block will be executed
                    valueTwo = valueOne * MULTIPLIER;
                    Console.WriteLine(
                    valueOne + " x " + MULTIPLIER + " = " + valueTwo);
                }
                else
                {
                    //The number is NOT between 1 and 12. The 'else' block will be executed
                    Console.WriteLine(
                    "You didn't enter a number between 1 and 12");
                }
            }
            catch (FormatException)
            {
                //The user didn't enter a whole number
                //A formatException has been thrown. The catch block should be executed
                Console.WriteLine( "You didn't enter a whole number");
            }
            Console.WriteLine("\nPress any key to exit");
            Console.Read();
        }
    }
}