7-2 Leap Year Lab | C# Online Compiler

7-2 Leap Year Lab by snanugonda

using System;
					
public class Program
{
	public static void Main()
	{
	string restart = "tennis";
		while (restart != "q")
		{
		Console.WriteLine("A leap year is where there is one extra day in a year, meaning there will be 366 days that year. This happens once every 4 years. The extra day happens on February 29th. We have them so the orbit of Earth around the Sun passes and the seasons passing happen at the right date.");
		Console.WriteLine("Please enter a year so we can determine whether it is a leap year or not");
		mistake:
		string input = Console.ReadLine();
		ulong n;
		if (ulong.TryParse(input, out n))
		{
			if (n < 1582)
			{
				Console.WriteLine("Enter a more recent year. This is because leap years were brought up first in the year of 1582, so it has to be after.");
			goto mistake;
			}
			else if (n > 3000)
			{
				Console.WriteLine("Enter a year closer to us. Please don't go so far into the future.");
			goto mistake;
			}
			else
			{
				if (n % 4 != 0)
						Console.WriteLine(n + " is not a leap year");
					else if (n % 100 != 0)
						Console.WriteLine(n + " is a leap year");
					else if (n % 400 != 0)
						Console.WriteLine(n + " is not a leap year");
					else
						Console.WriteLine(n + " is a leap year");
				}
			}
			else
			{
				Console.WriteLine("Error. Please make sure that you entered a positive integer");
					goto mistake;
			}
			
			if (n == 2000)
			{
				Console.WriteLine("The Summer Olympic Games were held in Sydney, Australia");
			}
			else if (n == 2001)
			{
				Console.WriteLine("Wikipedia is officially launched");
			}
			else if (n == 2002)
			{ 
				Console.WriteLine("The president undergoed a colonoscopy, meaning the vice president was president for a little bit of time");
			}
			else if (n == 2003)
			{ 
				Console.WriteLine("MySpace is first out");
			}
			else if (n == 2004)
			{ 
				Console.WriteLine("Earthquake in the Indian Ocean kills 250,000 people");
			}
			else if (n == 2005)
			{ 
				Console.WriteLine("The first female Chancellor of Germany is elected");
			}
			else if (n == 2006)
			{ 
				Console.WriteLine("I was born");
			}
			else if (n == 2007)
			{ 
				Console.WriteLine("The iPhone comes out");
			}
			else if (n == 2008)
			{ 
				Console.WriteLine("The Internet evolves even more and start to boom");
			}
			else if (n == 2009)
			{ 
				Console.WriteLine("Water is discovered on the moon");
			}
			else if (n == 2010)
			{ 
				Console.WriteLine("The Deepwater Horizon oil spill in the Gulf of Mexico becomes the largest maritime oil spill in history");
			}
			else if (n == 2011)
			{ 
				Console.WriteLine("The perpetrator of the 9/11 Attacks is killed in Operation Geronimo");
			}
			else if (n == 2012)
			{ 
				Console.WriteLine("NASA's Voyager 1 spacecraft becomes the first human-made object to leave the solar system and venture into interstellar space");
			}
			else if (n == 2013)
			{ 
				Console.WriteLine("The west African Ebola virus epidemic becomes the most widespread outbreak of Ebola virus disease in history");
			}
			else if (n == 2014)
			{ 
				Console.WriteLine("Narendra Modi is elected Prime Minister of India");
			}
			else if (n == 2015)
			{
				Console.WriteLine("Sundar Pichai takes over as Google CEO");
			}
			else if (n == 2016)
			{ 
				Console.WriteLine("Michael Phelps, who has 28 medals in the Olympics, retires");
			}
			else if (n == 2017)
			{ 
				Console.WriteLine("Usian Bolt, the fastest person in the world, retires.");
			}
			else if (n == 2018)
			{ 
				Console.WriteLine("Roger Federer becomes the first male tennis player to win 20 grand slams");
			}
			else if (n == 2019)
			{ 
				Console.WriteLine("Massive fire at the Notre Dame Cathedral in France");
			}
			else if (n == 2020)
			{ 
				Console.WriteLine("The COVID-19 Pandemic is found out and devastates millions of families");
			}
			else if (n == 2021)
			{ 
				Console.WriteLine("A special year due to the palindrome");
			}
			Console.WriteLine("Please press q to quit or any other key to restart the program");
					restart = Console.ReadLine();
					Console.Clear();
			}	  }	}

​x
 
using System;
                    
public class Program
{
    public static void Main()
    {
    string restart = "tennis";
        while (restart != "q")
        {
        Console.WriteLine("A leap year is where there is one extra day in a year, meaning there will be 366 days that year. This happens once every 4 years. The extra day happens on February 29th. We have them so the orbit of Earth around the Sun passes and the seasons passing happen at the right date.");
        Console.WriteLine("Please enter a year so we can determine whether it is a leap year or not");
        mistake:
        string input = Console.ReadLine();
        ulong n;
        if (ulong.TryParse(input, out n))
        {
            if (n < 1582)
            {
                Console.WriteLine("Enter a more recent year. This is because leap years were brought up first in the year of 1582, so it has to be after.");
            goto mistake;
            }
            else if (n > 3000)
            {
                Console.WriteLine("Enter a year closer to us. Please don't go so far into the future.");
            goto mistake;
            }
            else
            {
                if (n % 4 != 0)
                        Console.WriteLine(n + " is not a leap year");
                    else if (n % 100 != 0)
                        Console.WriteLine(n + " is a leap year");
                    else if (n % 400 != 0)
                        Console.WriteLine(n + " is not a leap year");
                    else
                        Console.WriteLine(n + " is a leap year");
                }
            }
            else
            {
                Console.WriteLine("Error. Please make sure that you entered a positive integer");
                    goto mistake;
            }
            
            if (n == 2000)
            {
                Console.WriteLine("The Summer Olympic Games were held in Sydney, Australia");
            }
            else if (n == 2001)
            {
                Console.WriteLine("Wikipedia is officially launched");
            }
            else if (n == 2002)
            { 
                Console.WriteLine("The president undergoed a colonoscopy, meaning the vice president was president for a little bit of time");
            }
            else if (n == 2003)
            { 
                Console.WriteLine("MySpace is first out");
            }
            else if (n == 2004)
            { 
                Console.WriteLine("Earthquake in the Indian Ocean kills 250,000 people");
            }
            else if (n == 2005)
            { 
                Console.WriteLine("The first female Chancellor of Germany is elected");
            }
            else if (n == 2006)
            { 
                Console.WriteLine("I was born");
            }
            else if (n == 2007)
            { 
                Console.WriteLine("The iPhone comes out");
            }
            else if (n == 2008)
            { 
                Console.WriteLine("The Internet evolves even more and start to boom");
            }
            else if (n == 2009)
            { 
                Console.WriteLine("Water is discovered on the moon");
            }
            else if (n == 2010)
            { 
                Console.WriteLine("The Deepwater Horizon oil spill in the Gulf of Mexico becomes the largest maritime oil spill in history");
            }
            else if (n == 2011)
            { 
                Console.WriteLine("The perpetrator of the 9/11 Attacks is killed in Operation Geronimo");
            }
            else if (n == 2012)
            { 
                Console.WriteLine("NASA's Voyager 1 spacecraft becomes the first human-made object to leave the solar system and venture into interstellar space");
            }
            else if (n == 2013)
            { 
                Console.WriteLine("The west African Ebola virus epidemic becomes the most widespread outbreak of Ebola virus disease in history");
            }
            else if (n == 2014)
            { 
                Console.WriteLine("Narendra Modi is elected Prime Minister of India");
            }
            else if (n == 2015)
            {
                Console.WriteLine("Sundar Pichai takes over as Google CEO");
            }
            else if (n == 2016)
            { 
                Console.WriteLine("Michael Phelps, who has 28 medals in the Olympics, retires");
            }
            else if (n == 2017)
            { 
                Console.WriteLine("Usian Bolt, the fastest person in the world, retires.");
            }
            else if (n == 2018)
            { 
                Console.WriteLine("Roger Federer becomes the first male tennis player to win 20 grand slams");
            }
            else if (n == 2019)
            { 
                Console.WriteLine("Massive fire at the Notre Dame Cathedral in France");
            }
            else if (n == 2020)
            { 
                Console.WriteLine("The COVID-19 Pandemic is found out and devastates millions of families");
            }
            else if (n == 2021)
            { 
                Console.WriteLine("A special year due to the palindrome");
            }
            Console.WriteLine("Please press q to quit or any other key to restart the program");
                    restart = Console.ReadLine();
                    Console.Clear();
            }     } }
​

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