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Check leap year

A leap year is a year that is divisible by 4, except for years that are divisible by 100 but not by 400. In other words, a leap year has 366 days instead of the usual 365 days, with an extra day added to the month of February (which has 29 days instead of 28).

For example, the year 2020 was a leap year because it is divisible by 4, and the year 1900 was not a leap year because it is divisible by 100 but not by 400. However, the year 2000 was a leap year because it is divisible by both 100 and 400.

The purpose of adding an extra day to the calendar in a leap year is to keep our Gregorian calendar in sync with the solar year, which is approximately 365.2422 days long. Without leap years, our calendar would slowly drift out of sync with the seasons over time.

How to calculate

To calculate if a given year is a leap year or not, you can follow these steps:

  1. Check if the year is divisible by 4. If it is, go to step 2. If it is not, the year is not a leap year.

  2. Check if the year is divisible by 100. If it is, go to step 3. If it is not, the year is a leap year.

  3. Check if the year is divisible by 400. If it is, the year is a leap year. If it is not, the year is not a leap year.

Let's use the year 2024 as an example:

  1. Is 2024 divisible by 4? Yes.
  2. Is 2024 divisible by 100? No.
  3. Is 2024 divisible by 400? No. Therefore, 2024 is a leap year.

Now let's use the year 2100 as an example:

  1. Is 2100 divisible by 4? Yes.
  2. Is 2100 divisible by 100? Yes.
  3. Is 2100 divisible by 400? No. Therefore, 2100 is not a leap year.

Here given code implementation process.

// C Program to
// Check leap year
#include <stdio.h>

//Function which is check whether given year is leap year or not
void is_leap_year(int year)
{
	// Check if Year is divisible by 4 or not
	// If year is divisible by 4, then check two case
	// Case 1 : Check if year is divisible by 100 or not
	// Case 2 : Check if Year is divisible by 400 or not
	// If any one case true then year is leap year
	if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
	{
		//When year is leap year
		printf("%d is a leap year", year);
	}
	else
	{
		printf("%d is not a leap year", year);
	}
	printf("\n");
}
int main()
{
	//Test Case
	is_leap_year(2020);
	is_leap_year(2018);
	is_leap_year(2025);
	is_leap_year(2050);
	is_leap_year(2032);
	is_leap_year(2100);
	return 0;
}

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
/*
  Java Program
  Check leap year
*/
class MyMaths
{
	//Function which is check whether given year is leap year or not
	public void is_leap_year(int year)
	{
		// Check if Year is divisible by 4 or not
		// If year is divisible by 4, then check two case
		// Case 1 : Check if year is divisible by 100 or not
		// Case 2 : Check if Year is divisible by 400 or not
		// If any one case true then year is leap year
		if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
		{
			//When year is leap year
			System.out.print("\n" + year + " is a leap year" );
		}
		else
		{
			System.out.print("\n" + year + " is not a leap year");
		}
	}
	public static void main(String[] args)
	{
		MyMaths obj = new MyMaths();
		//Test Case
		obj.is_leap_year(2020);
		obj.is_leap_year(2018);
		obj.is_leap_year(2025);
		obj.is_leap_year(2050);
		obj.is_leap_year(2032);
		obj.is_leap_year(2100);
	}
}

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
/*
  C++ Program
  Check leap year
*/
#include<iostream>

using namespace std;
class MyMaths
{
	public:
		//Function which is check whether given year is leap year or not
		void is_leap_year(int year)
		{
			// Check if Year is divisible by 4 or not
			// If year is divisible by 4, then check two case
			// Case 1 : Check if year is divisible by 100 or not
			// Case 2 : Check if Year is divisible by 400 or not
			// If any one case true then year is leap year
			if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
			{
				cout << "\n" << year << " is a leap year";
			}
			else
			{
				cout << "\n" << year << " is not a leap year";
			}
		}
};
int main()
{
	MyMaths obj =  MyMaths();
	//Test Case
	obj.is_leap_year(2020);
	obj.is_leap_year(2018);
	obj.is_leap_year(2025);
	obj.is_leap_year(2050);
	obj.is_leap_year(2032);
	obj.is_leap_year(2100);
	return 0;
}

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
<?php
/*
  Php Program
  Check leap year
*/
class MyMaths
{
	//Function which is check whether given year is leap year or not
	function is_leap_year($year)
	{
		// Check if Year is divisible by 4 or not
		// If year is divisible by 4, then check two case
		// Case 1 : Check if year is divisible by 100 or not
		// Case 2 : Check if Year is divisible by 400 or not
		// If any one case true then year is leap year
		if ($year % 4 == 0 && (($year % 100 != 0) || $year % 400 == 0))
		{
			echo "\n". $year ." is a leap year";
		}
		else
		{
			echo "\n". $year ." is not a leap year";
		}
	}
}

function main()
{
	$obj = new MyMaths();
	//Test Case
	$obj->is_leap_year(2020);
	$obj->is_leap_year(2018);
	$obj->is_leap_year(2025);
	$obj->is_leap_year(2050);
	$obj->is_leap_year(2032);
	$obj->is_leap_year(2100);
}
main();

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
/*
  Node Js Program
  Check leap year
*/
class MyMaths
{
	//Function which is check whether given year is leap year or not
	is_leap_year(year)
	{
		// Check if Year is divisible by 4 or not
		// If year is divisible by 4, then check two case
		// Case 1 : Check if year is divisible by 100 or not
		// Case 2 : Check if Year is divisible by 400 or not
		// If any one case true then year is leap year
		if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
		{
			process.stdout.write("\n" + year + " is a leap year");
		}
		else
		{
			process.stdout.write("\n" + year + " is not a leap year");
		}
	}
}

function main()
{
	var obj = new MyMaths();
	//Test Case
	obj.is_leap_year(2020);
	obj.is_leap_year(2018);
	obj.is_leap_year(2025);
	obj.is_leap_year(2050);
	obj.is_leap_year(2032);
	obj.is_leap_year(2100);
}
main();

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
/*
  C# Program
  Check leap year
*/
using System;
class MyMaths
{
	//Function which is check whether given year is leap year or not
	public void is_leap_year(int year)
	{
		// Check if Year is divisible by 4 or not
		// If year is divisible by 4, then check two case
		// Case 1 : Check if year is divisible by 100 or not
		// Case 2 : Check if Year is divisible by 400 or not
		// If any one case true then year is leap year
		if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
		{
			Console.Write("\n" + year + " is a leap year");
		}
		else
		{
			Console.Write("\n" + year + " is not a leap year");
		}
	}
	public static void Main(String[] args)
	{
		MyMaths obj = new MyMaths();
		//Test Case
		obj.is_leap_year(2020);
		obj.is_leap_year(2018);
		obj.is_leap_year(2025);
		obj.is_leap_year(2050);
		obj.is_leap_year(2032);
		obj.is_leap_year(2100);
	}
}

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
#   Python 3 Program
#   Check leap year

class MyMaths :
	# Function which is check whether given year is leap year or not
	def is_leap_year(self, year) :
		#  Check if Year is divisible by 4 or not
		#  If year is divisible by 4, then check two case
		#  Case 1 : Check if year is divisible by 100 or not
		#  Case 2 : Check if Year is divisible by 400 or not
		#  If any one case true then year is leap year
		if (year % 4 == 0 and((year % 100 != 0) or year % 400 == 0)) :
			print("\n", year ," is a leap year", end = "")
		else :
			print("\n", year ," is not a leap year", end = "")
		
	

def main() :
	obj = MyMaths()
	# Test Case
	obj.is_leap_year(2020)
	obj.is_leap_year(2018)
	obj.is_leap_year(2025)
	obj.is_leap_year(2050)
	obj.is_leap_year(2032)
	obj.is_leap_year(2100)

if __name__ == "__main__": main()

Output

 2020  is a leap year
 2018  is not a leap year
 2025  is not a leap year
 2050  is not a leap year
 2032  is a leap year
 2100  is not a leap year
#   Ruby Program
#   Check leap year

class MyMaths

	# Function which is check whether given year is leap year or not
	def is_leap_year(year)
	
		#  Check if Year is divisible by 4 or not
		#  If year is divisible by 4, then check two case
		#  Case 1 : Check if year is divisible by 100 or not
		#  Case 2 : Check if Year is divisible by 400 or not
		#  If any one case true then year is leap year
		if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
		
			# When year is leap year
			print("\n", year ," is a leap year")
		else
		
			print("\n", year ," is not a leap year")
		end
	end
end
def main()

	obj = MyMaths.new()
	# Test Case
	obj.is_leap_year(2020)
	obj.is_leap_year(2018)
	obj.is_leap_year(2025)
	obj.is_leap_year(2050)
	obj.is_leap_year(2032)
	obj.is_leap_year(2100)
end
main()

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
/*
  Scala Program
  Check leap year
*/
class MyMaths
{
	//Function which is check whether given year is leap year or not
	def is_leap_year(year: Int): Unit = {
		// Check if Year is divisible by 4 or not
		// If year is divisible by 4, then check two case
		// Case 1 : Check if year is divisible by 100 or not
		// Case 2 : Check if Year is divisible by 400 or not
		// If any one case true then year is leap year
		if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
		{
			//When year is leap year
			print("\n" + year + " is a leap year");
		}
		else
		{
			print("\n" + year + " is not a leap year");
		}
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var obj: MyMaths = new MyMaths();
		//Test Case
		obj.is_leap_year(2020);
		obj.is_leap_year(2018);
		obj.is_leap_year(2025);
		obj.is_leap_year(2050);
		obj.is_leap_year(2032);
		obj.is_leap_year(2100);
	}
}

Output

2020 is a leap year
2018 is not a leap year
2025 is not a leap year
2050 is not a leap year
2032 is a leap year
2100 is not a leap year
/*
  Swift Program
  Check leap year
*/
class MyMaths
{
	//Function which is check whether given year is leap year or not
	func is_leap_year(_ year: Int)
	{
		// Check if Year is divisible by 4 or not
		// If year is divisible by 4, then check two case
		// Case 1 : Check if year is divisible by 100 or not
		// Case 2 : Check if Year is divisible by 400 or not
		// If any one case true then year is leap year
		if (year % 4 == 0 && ((year % 100 != 0) || year % 400 == 0))
		{
			print("\n", year ," is a leap year", terminator: "");
		}
		else
		{
			print("\n", year ," is not a leap year", terminator: "");
		}
	}
}
func main()
{
	let obj: MyMaths = MyMaths();
	//Test Case
	obj.is_leap_year(2020);
	obj.is_leap_year(2018);
	obj.is_leap_year(2025);
	obj.is_leap_year(2050);
	obj.is_leap_year(2032);
	obj.is_leap_year(2100);
}
main();

Output

 2020  is a leap year
 2018  is not a leap year
 2025  is not a leap year
 2050  is not a leap year
 2032  is a leap year
 2100  is not a leap year
Last updated on by Kalkicode




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