A year in the modern Gregorian Calendar consists of 365 days. In reality, the earth takes longer to rotate around the sun. To account for the difference in time, every 4 years, a leap year takes place. A leap year is when a year has 366 days: An extra day, February 29th. The requirements for a given year to be a leap year are: 1) The year must be divisible by 4 2) If the year is a century year (1700, 1800, etc.), the year must be evenly divisible by 400 Some example leap years are 1600, 1712, and 2016. Write a program that takes in a year and determines whether that year is a leap year. Ex: If the input is: 1712 the output is: 1712 is a leap year. Ex: If the input is: 1913 the output is: 1913 is not a leap year. Your program must define and call the following function. The function should return true if the input year is a leap year and false otherwise. def is_leap_year(user_year)

def is_leap_year(user_year):

   is_leap = True

   if (user_year % 4) == 0:

       if (user_year % 100) == 0:

           if (user_year % 400) == 0:

               is_leap = True

           else:

               is_leap = False

       else:

           is_leap = True

   else:

       is_leap = False

   return is_leap

year = int(input("Enter a year: "))

if is_leap_year(year):

   print(str(year) + " is a leap year.")

else:

   print(str(year) + " is not a leap year.")

Explanation:

- Create the function that takes year as a parameter

- Initialize a variable is_leap that is updated depending if the year is a leap year or not

- Using if else structure, check if the year is a leap or not. If it is a leap year, set is_leap as True, otherwise set it as False. Return the value of the is_leap at the end of the function.

- Ask user to enter a year

- Call the function, if it is a leap year or not

- Print the result accordingly

def is_leap_year(year):

  if(year % 400 == 0):

      return True

  elif year % 100 == 0:

      return False

  elif year%4 == 0:

      return True

  else:

      return False  

if __name__ == '__main__':

  n = int(input())

  if(is_leap_year(n)):

      print(n,"is a leap year.")

  else:

      print(n, "- not a leap year")

Explanation:

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