40 lines
1.0 KiB
Markdown
40 lines
1.0 KiB
Markdown
# Leap
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Write a program that will take a year and report if it is a leap year.
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The tricky thing here is that a leap year occurs:
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```plain
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on every year that is evenly divisible by 4
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except every year that is evenly divisible by 100
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unless the year is also evenly divisible by 400
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```
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For example, 1997 is not a leap year, but 1996 is. 1900 is not a leap
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year, but 2000 is.
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If your language provides a method in the standard library that does
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this look-up, pretend it doesn't exist and implement it yourself.
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## Notes
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For a delightful, four minute explanation of the whole leap year
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phenomenon, go watch [this youtube video][video].
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[video]: http://www.youtube.com/watch?v=xX96xng7sAE
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Check out [Exercism
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Help](http://help.exercism.io/getting-started-with-haskell.html) for
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instructions to get started writing Haskell.
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## Running Tests
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Use `runhaskell` (included in the Haskell Platform) to compile and run your
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Haskell code.
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$ runhaskell -Wall bob_test.hs
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## Source
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JavaRanch Cattle Drive, exercise 3 [view source](http://www.javaranch.com/leap.jsp)
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