Leap Year Calculator

leap.rb

puts "Enter a starting year in the format YYYY"
starting = gets.chomp!.to_i
puts "Enter an ending year in the format YYYY"
ending = gets.chomp!.to_i
puts "LEAP YEARS between #{starting} and #{ending}"

starting.upto(ending) do |year|
  divisible_by_4 = (year % 4) == 0
  not_divisible_by_100 = (year % 100) != 0
  divisible_by_400 = (year % 400) == 0
  is_leap_year = (divisible_by_4 && not_divisible_by_100) || divisible_by_400
  if is_leap_year
    puts "#{year}"
  end
end