using System;
using System.IO;

class My_Name
{
    static void Main()
    {
        string firstName = "Azrin";
        string lastName = "Hadah";
        int counter = 0;
        int left = 2;
        int right = -3;
        int age = 0;
        int older = 10;

        Console.WriteLine("Task 1 : Create, compile and run a “Hello C#” console application.\n");
        Console.ReadKey(true);

        Console.WriteLine("Task 2: Create console application that prints your first and last name.\n");
        Console.WriteLine("Hello ! My name is {0} {1}\n", firstName, lastName);
        Console.ReadKey(true);

        Console.WriteLine("Task 3 : Write a program to print the numbers 1, 101 and 1001.\n");
        Console.WriteLine("1");
        Console.WriteLine("101");
        Console.WriteLine("1001");
        Console.ReadKey(true);

        Console.WriteLine("Task 4 : Create a console application that prints the current date and time.\n");
        DateTime time = DateTime.Now;
        string format = "MMM ddd d HH:mm yyyy";
        Console.WriteLine("Current date and time is :{0}", time.ToString(format));
        Console.ReadKey(true);

        Console.WriteLine("Task 5 : Create a console application that calculates and prints the square of the number 12345.\n");
        double square = Math.Pow(12345, 2);
        Console.WriteLine("Square of 12345 is : {0}", square);
        Console.ReadKey(true);

        Console.WriteLine("Task 6 : Write a program that prints the first 10 members of the sequence: 2, -3, 4, -5, 6, -7, ...\n");

        for (int i = 0; i < 5; i++)
        {
            Console.WriteLine(left);
            Console.WriteLine(right);
            left = left + 2;
            right = right - 2;
            counter++;
        }
        Console.ReadKey(true);

        Console.WriteLine("Task 7 : Write a program to read your age from the console and print how old you will be after 10 years.\n");

        Console.WriteLine("Type your age:");
        while (true)
        {
            try
            {
                age = int.Parse(Console.ReadLine());
                older += age;
                Console.WriteLine("Ten years later you will be : {0}", older);
                break;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

    }
}