automatically numbering rows

C

cox ng \(1\)

I wish to have rows automatically numbered in column "A" according to the
content in column "B". If column "B" has text or numbers in a cell I do not
want to number that row in column "A". If column "B" is blank in a cell I
want to number that row in column "A". I found the following formula that
works the opposite of what I want "=IF(B1<>"",COUNTA($B$1:B1)&".","")" .
What would the formula be if I wanted to numerically count the blank cells
in "B" and skip the context cells in "B"? Thanks for you consideration.
Regards
 
M

Mark Lincoln

Here's my method:

In cell A1:

=IF(isblank(B1),1,"")

In cell A2:

=IF(ISBLANK(B2),MAX($A$1:A1)+1,"")

Drag the formula in A2 down as far as you need.
 
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