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# Leap
Given a year, report if it is a leap year.
The tricky thing here is that a leap year in the Gregorian calendar occurs:
```text
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.
If your language provides a method in the standard library that does
this look-up, pretend it doesn't exist and implement it yourself.
## 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][video].
[video]: http://www.youtube.com/watch?v=xX96xng7sAE
## Setup
There are two different methods of getting set up to run the tests with Objective-C:
- Create an Xcode project with a test target which will run the tests.
- Use the ruby gem `objc` as a test runner utility.
Both are described in more detail here: http://exercism.io/languages/objective-c
### Submitting Exercises
When submitting an exercise, make sure your solution file is in the same directory as the test code.
The submit command will look something like:
```shell
exercism submit <path-to-exercism-workspace>/objective-c/leap/Leap.m
```
You can find the Exercism workspace by running `exercism debug` and looking for the line beginning
with Workspace.
## Source
JavaRanch Cattle Drive, exercise 3 [http://www.javaranch.com/leap.jsp](http://www.javaranch.com/leap.jsp)
## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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