Question

How to check leap year in C#

Answer 1

using System;

public class CheckLeapYear_CSharp
{
	public static void Main(string[] args)
	{
		try {
            int year = 2016;
 
            if (year % 400 == 0)
                Console.WriteLine("{0} is a leap year.", year);
            else if (year % 100 == 0)
                     Console.WriteLine("{0} is not a leap year.", year);
                 else if (year % 4 == 0)
                          Console.WriteLine("{0} is a leap year.", year);
                      else
                          Console.WriteLine("{0} is not a leap year.", year);
        }
        catch (Exception ex) {
            Console.WriteLine(ex.Message);
        }
	}
}



/*
run:
 
2016 is a leap year.
 
*/

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Answer 2

using System;

public class CheckLeapYear_CSharp
{
	static bool isLeapYear(int year) {
        if (year % 400 == 0)
            return true;
        else if (year % 100 == 0)
                 return false;
        else if (year % 4 == 0)
                 return true;
 
        return false;
    }
        
	public static void Main(string[] args)
	{
		try {
            int[] years = {2000, 2400, 1800, 1900, 2100, 2200, 2300, 2500,
                           2008, 2012, 2016, 2020, 2024, 2048, 2032};
 
            foreach (int yr in years) {
                if (isLeapYear(yr))
                    Console.WriteLine("{0} is a leap year.", yr);
                else
                    Console.WriteLine("{0} is not a leap year.", yr);
            }
        }
        catch (Exception ex) {
            Console.WriteLine(ex.Message);
        }
    }
}



/*
run:
 
2000 is a leap year.
2400 is a leap year.
1800 is not a leap year.
1900 is not a leap year.
2100 is not a leap year.
2200 is not a leap year.
2300 is not a leap year.
2500 is not a leap year.
2008 is a leap year.
2012 is a leap year.
2016 is a leap year.
2020 is a leap year.
2024 is a leap year.
2048 is a leap year.
2032 is a leap year.
 
*/

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Answer 3

using System;

public class CheckLeapYear_CSharp
{
	public static void Main(string[] args)
	{
		int year = 2016;
		
		try {
            if (DateTime.IsLeapYear(year))
                Console.WriteLine("{0} is a leap year.", year);
            else
                Console.WriteLine("{0} is not a leap year.", year);
        }
        catch (Exception ex) {
            Console.WriteLine(ex.Message);
        }
    }
}



/*
run:
 
2016 is a leap year.
 
*/

 

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