Leap

Introduction

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
• 2001 is not a leap year

If your language provides a method in the standard library that does this look-up, pretend it doesn't exist and implement it yourself.

Source

JavaRanch Cattle Drive, exercise 3