fei wrote:
what does it mean?
---------

The other guys have answered the specific question you actually asked.

However in answer to the question you *didn't* ask, within Excel click
on "Help" at the top then on "Contents and Index". Type "IF" into the
search window and it will bring up a lot of helpful information on the
IF() function -- complete with examples of how to use it.

Excel has a good set of help information for all of it's functions and
it's generally a great place to start and a good learning tool.

Good luck...

Bill