|The Excel Help files give a pretty good description and examples of the functions, assuming you know what function to use.|
For example, if you begin typing a formula in the formula bar, e.g. =IF( a pop-up will appear below the formula with the syntax for that function. If you move your mouse down to the function in that pop-up and click it, the Help file for that function will open.
In addition, a Google search for a function will give you lots of hits including forum posts, examples, etc.
If you don't know what function to use, most times a Google search of what you are trying to do will work. e.g. for the question you posted in this thread, a Google search like this might lead you to a solution:
excel how to return value based on value in cell
Of course, there are lots of forums like this one where you can get help.
Then there are books, websites, video tutorials, and classes at adult education centers.
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