Leap Year Program in Python

Leap year program in Python: Write a program in python to check leap year or not?

What is Leap Year?

Leap year is a year that comes after every four years. 
Actually, it takes about 1 year 6 hours for an earth to complete one revolution around the sun, due to which one day increases in every 4 years.

In order to adjust, extra one day is added in the month of February after every 4 years to maintain the balance.

Rules to check weather year is a leap year or not?

A year is said to be leap year if it satisfies following two condition:

1. Year is exactly divisible by 4 but it is not a century year (year ending with 00).
2. If year is a century year then it must be exactly divisible by 100 as well as 400.

Example:

• 1900 is not a leap year. (Since it is a century year but not divisible by 400).

• 2017 is not a leap year. (Since not divisible by 4)

• 2012 is a leap year. (Because it is divisible by 4)

• 2000 is a leap year. (Since it is a century year and is exactly divisible by 400).

Leap Year Program in Python

Program:

year = int(input("Enter the year\n"))

if (((year%4 == 0) and (year%100 != 0)) or (year%400 == 0)):
    print("Leap Year");
else:
    print("Not a Leap Year");

Output:

Enter the year
2012
Leap Year  

Leap Year Program in Python Using Function

Write a program to check the given year is leap year or not using functions in python

Program:

def leapYear(year):
    if (((year%4 == 0) and (year%100 != 0)) or (year%400 == 0)):
        print("\n{0} is a Leap Year".format(year));
    else:
        print("\n{0} is Not a Leap Year".format(year));
    

year = int(input("Enter the year\n"))
leapYear(year)

Output:

Enter the year
1900

1900 is Not a Leap Year