If you know the current page, and total page count, how to mimick paging like google?

Having a tough time figuring out the start and end for my loop.

I am looping and generating links for pages for a pager.

No matter what page the user is on, I want to show 10 links BEFORE and AFTER the current page.

just like google does.

I need help calculating the start and end for this loop.开发者_Python百科

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for(int i = Math.Max(pageNum - 10, 1); i <= Math.Min(pageNum + 10, maxPage); ++i)
  WritePageLink(i);