This article was previously published under Q149577
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In Microsoft Excel, when you use a formula that tests for a zero value,you may see unexpected results if the cell is blank. Microsoft Excelinterprets a blank cell as zero, and not as empty or blank. Therefore,any cells that are blank are evaluated as zero in the function.
If you are checking a cell for a zero value and the cell is blank, thetest evaluates to true. For example, if you have the following formula incell A1:
and B1 is blank, the formula returns "zero" and not "blank" as expected.
If the range might contain a blank cell, you should use the ISBLANKfunction to test for a zero value, as in the following example:
Note that the above formula returns "zero" if there is a zero value in thecell, "blank" if the cell is blank, and "other" if anything else in thecell.
You must always use the ISBLANK formula first before you test for a zerovalue, otherwise you will always return a "true" for the zero value, andnever get to the test for the ISBLANK formula.