What is O(n log n) or O(n log(log n))

Posted by Mark Tomlin on Stack Overflow See other posts from Stack Overflow or by Mark Tomlin
Published on 2010-03-20T06:06:13Z Indexed on 2010/03/20 6:11 UTC
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logarithm

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numbers

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function

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math

What does O, if indeed it is a Oh (As in the letter O) not the number Zero (0) mean? I think the n would be number, but I'm not sure as I'm not a 'real' computer programmer, just a hobbyist. And log would be logarithmic function, but I only know that because of smarter people then I have told me this, while never really explaining what a logarithm is.

So please, in plain English, explain what this is, and the differences between the two (such as their applications.

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