Leap year method

leap_year.rb

#Leap years are divisible by 4 (like 1992 and 1996). 
#There is an exception, though, and an exception to the exception: 
#if a year is divisible by 100, it's not a leap year (like 1900), 
#unless it is also divisible by 400 (like the year 2000).

def leap_year? (year)
  if year%100 == 0 && year%400 == 0
    puts "Leap Year!"
  elsif year%4 == 0 && year%100 != 0
    puts "Leap Year!"
  else
    puts "Not Leap Year!"
  end
end