Answers for "how to know if a year is a leap year"

Check if a year is a leap 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";

Check Leap Year

#include <iostream>
using namespace std;

int main() {
    int year;
    cout << "Enter a year: ";
    cin >> year;
    if (year % 4 == 0) {
        if (year % 100 == 0) {
            (year % 400 == 0) ?
            cout << year << " is a leap year." :
            cout << year << " is not a leap year.";
        }
        else
            cout << year << " is a leap year.";
    }
    else
        cout << year << " is not a leap year.";
    return 0;
}

calculate if year is leap year

if (i%4==0 && i%100!=0 || i%400==0) {
months[2] = 29;
}
else {
month[2] = 28;
}

Check if a year is leap year

#include<iostream>
using namespace std;
int main() {
   int year = 2016;
   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;
}

leap year

import calendar

def is_leap(year):
    return calendar.isleap(year)