In this post, we will learn how to check leap year using C++ Programming language.
A Leap year has 366 days (the extra day is the 29th February).
To check whether a year is leap year or not, there are following parameters which we have to check:
- Exactly divisible by 4
- Not Exactly divisible by 100
- Except if it is exactly divisible by 400
Hence, we have to check whether the year is exactly divisible by 4 and 400 and not divisible by 100 to be a leap year.
So, without further ado, let’s begin this tutorial.
C++ Program to Check Leap Year
// C++ Program to Check Leap Year
#include <iostream>
using namespace std;
int main(){
int year;
// Asking for input
cout << "Enter the year: ";
cin >> year;
// Checking Leap Year
if (year % 4 == 0){
if (year % 100 == 0){
if (year % 400 == 0)
cout << year << " is a leap year.";
else
cout << year << " is not a leap year.";
}
else
cout << year << " is a leap year.";
}
else
cout << year << " is not a leap year.";
return 0;
}
Output 1
Enter the year: 2028
2028 is a leap year.
Output 2
Enter the year: 2050
2050 is not a leap year
.How Does This Program Work ?
int year;
In this program, we have declared an int data type variable named year.
// Asking for input
cout << "Enter the year: ";
cin >> year;
Then, the user is asked to enter the year.
// Checking Leap Year
if (year % 4 == 0){
if (year % 100 == 0){
if (year % 400 == 0)
cout << year << " is a leap year.";
else
cout << year << " is not a leap year.";
}
else
cout << year << " is a leap year.";
}
else
cout << year << " is not a leap year";
Now, we check whether the entered year is exactly divisible by 4 and 400 and not divisible by 100. If all of the conditions are true, then the entered year is a leap year otherwise it’s not a leap year.
C++ Program to Check Leap Year in One Line
// C++ Program to Check Leap Year
#include <iostream>
using namespace std;
int main(){
int year;
// Asking for input
cout << "Enter the year: ";
cin >> year;
if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))
cout << year << " is a leap year.";
else
cout << year << " is not a leap year.";
return 0;
}
Output 1
Enter the year: 2012
2012 is a leap year.
Output 2
Enter the year: 2012
2012 is a leap year.
Conclusion
I hope after going through this post, you understand how to check whether a year is a leap year or not using C++ Programming language.
If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to assist you.
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