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:

- Year is exactly divisible by 4 but it is not a century year (year ending with 00).
- 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 yearn"))
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 yearn"))
leapYear(year)
```

**Output**:

```
Enter the year
1900
1900 is Not a Leap Year
```