This is due to the fact there are ways
of Hiding
Data through the use of identically-colored fonts, empty-string results
of a formula, or masking the data with the use of Custom Formatting (three
semicolons: ;;; ). If you don’t know if a cell is Truly
Blank, it can cause Mayhem with your calculations.
To detect this Invisible Data, there are
at least a couple of techniques.
Assuming your cell in question is A1, you can:
1.
Simply insert this Function
in an adjacent cell: =ISBLANK(A1)
a.
If the cell is Blank, it will return True;
if it is Not Blank, it will return False
2.
Also use an IF Statement as
follows: =IF(A1<>"","Not Blank", "Blank")
a.
This IF Statement obviously
returns Blank or Not Blank
By determining if your cells are Truly
Blank, you can Avoid Problems on your worksheets,
and I don’t know about you, but I think Avoiding Problems, Rocks!