IF logical test

I have one column entitled "date" and the one next to it entitled "description"

In the column that says date not all of the rows have an actual date in it (which is correct) - so what I'm trying to do is create a function so that when there is a date in column A - the row in column B says "yes" and when there's no date in column A - the row in column B says nothing.

For example

Date Description
07/04/2011 Yes
08/08/2011 Yes

07/04/2011 Yes

07/25/2011 Yes
09/19/2011 Yes
10/17/2011 Yes


Thanks

=if(A1<>"","YES","")

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