Leap year program in c | c++ and java

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What is leap year?

Leap year is an year occurring once evry four years. This year has 29th day in february and 366 days in total.

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Leap year logic

1.If the year is completely divisible by 4 then End 1.
2. If the year is completely divisible by 100.
3. If the year is completely divisible by 400 then it is a leap year End 3.
Else this is a leap year. End 3.
Else this is a not a leap year. End 1.

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Prerequisite programming concepts

• C If else and nested if else
• C Input output operations
• Datatypes in c

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C program to check leap year

leap year program in c is as below:

#include<stdio.h>
int main(int argc, char const *argv[])
{
	int year;
	//input the year.
	printf("C program to find leap year\nEnter a year\n");
	scanf("%d",&year);
	if( year % 4 == 0  )
	{
		if( year % 100 == 0  )
		{
			if( year % 400 == 0 )
				printf( "%d is leap year" , year );
			else
				printf( "%d is not a leap year" , year );
		}
		else
		{
			printf( "%d is not a leap year" , year );
		}
	}
	else
	{
		printf( "%d is not a leap year" , year );
	}
	return 0;
}

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C++ program to check leap year

#include<iostream>
using namespace std;
int main(int argc, char const *argv[])
{
	int year;
	//input the year.
	cout<<"C++ program to find leap year\nEnter a year\n";
	cin>>year;
	if( year % 4 == 0  )
	{
		if( year % 100 == 0  )
		{
			if( year % 400 == 0 )
				cout<<year <<" is leap year\n";
			else
				cout<<year <<" is not a leap year\n";
		}
		else
		{
			cout<<year <<" is  leap year\n";
		}
	}
	else
	{
		cout<<year <<" is not a leap year\n";
	}
	return 0;
}

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Java program to check leap year

import java.util.Scanner;

public class LeapYearInJava {

	public static void main(String[] args) {
	  int year;
	  Scanner stdin= new Scanner(System.in);
	  System.out.println( "Leap year program in java.\n Enter a year." );
	  year=stdin.nextInt();
	  if( year % 4 ==0 )
	  {
		  if( year % 100 == 0  )
		  {
			  if( year % 400 ==0  ) {
				  System.out.println(year+" is a leap year");
			  }
			  else {
				  System.out.println(year+" is not a leap year");
			  }
		  }
		  else
		  {
			  System.out.println(year+" is leap year");
		  }
		  
	  }
	  else
	  {
		  System.out.println(year+" is c not leap year");
	  }

	}

}

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