I don't think you need an array formula

=IF(COUNTIF(A1:A9,1)0,"",1)

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HTH

Bob

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"Just 4 Today" <Just 4 wrote in message
...
I am using Excel 2003.
I would like to check all cells in an array for a number. In a cell not
in
the array I have the formula {=If(A1:A9=1," ",1)}. Currently if there is a
1
in A1 I get a blank. If there is a 1 in A2 to A9 I get a 1 not a blank.
Why?