ISBLANK
See also A-Z Spreadsheet Function List
Description Determines if the specified cell is blank.
Syntax ISBLANK(reference)
reference is a reference to any cell.
Remarks If the referenced cell is blank, True is returned. False is returned if the cell is not blank.
See Also ISERR , ISERROR , ISLOGICAL , ISNA , ISNONTEXT , ISNUMBER , ISREF , and ISTEXT functions
Example ISBLANK(A1) returns True if A1 is a blank cell.