Leap

Leap

Easy

Instructions

Given a year, report if it is a leap year.

The tricky thing here is that a leap year in the Gregorian calendar occurs:

on every year that is evenly divisible by 4
  except every year that is evenly divisible by 100
    unless the year is also evenly divisible by 400

For example, 1997 is not a leap year, but 1996 is. 1900 is not a leap year, but 2000 is.

Notes

Though our exercise adopts some very simple rules, there is more to learn!

For a delightful, four minute explanation of the whole leap year phenomenon, go watch this youtube video.

Last updated 26 October 2021
Edit via GitHub The link opens in a new window or tab
Emacs Lisp Exercism

Ready to start Leap?

Sign up to Exercism to learn and master Emacs Lisp with 28 exercises, and real human mentoring, all for free.