ISBLANK
Description
ISBLANK determines if the specified cell is blank.
Syntax
ISBLANK ( reference )
| Parameter | Description | 
| reference | A reference to any cell. | 
Remarks
If the referenced cell is blank, True is returned. False is returned if the cell is not blank.
Example
This function returns True if A1 is a blank cell:
ISBLANK(A1)
Also, see