Leap

Challenge Overview

Determine whether a given year is a leap year.

Introduction

A leap year (in the Gregorian calendar) occurs:

In every year that is evenly divisible by 4.
Unless the year is evenly divisible by 100, in which case it’s only a leap year if the year is also evenly divisible by 400.

Some examples:

1997 was not a leap year as it’s not divisible by 4.
1900 was not a leap year as it’s not divisible by 400.
2000 was a leap year!

For a delightful, four-minute explanation of the whole phenomenon of leap years, check out [this YouTube video](https://www.youtube.com/watch?v=xX96xng7sAE).

Instructions

Your task is to determine whether a given year is a leap year.

Source: Exercism ruby/leap

💡 View Solution

module Year
  def self.leap?(year)
    year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)
  end
end