Find name of the last cell with data in a row - excel

Question

I've searched for an answer, but it seems that I can only find VBA-based solutions, which appear no longer be an option in Excel 2008.
I'm trying to return the name of the last cell in a row that contains data. It looks like this:
+===========================================================+
A / B / C / D / E (columns)
+===========================================================+
1 || [Formula] / 3 / 4 / 5 / [blank]
2 || [Formula] / 7 / 8 / [blank] / [blank]
3 || [Formula] / 9 / 10 / 11 / 12
(rows)
+===========================================================+
and the end result would look like this:
+===========================================================+
A / B / C / D / E (columns)
+===========================================================+
1 || D1 / 3 / 4 / 5 /
2 || C2 / 7 / 8 / /
3 || E3 / 9 / 10 / 11 / 12
(rows)
+===========================================================+

Answer 1

It looks like your data is sorted from left to right.
If it is, you could start with something like =MATCH(MAX(C4:K4);C4:K4) to retrieve the column index of the last cell (max) of the row. From there, it's easy to buid the address:
=ADDRESS(ROW();MATCH(MAX(C1:K1);C1:K1);4)
Edit: combining ADDRESS with COUNT or COUNTA (great idea from Dustin Geile) does not require the items to be sorted:
=ADDRESS(ROW();COLUMN()+COUNT(B1:Z1);4)

Answer 2

=CHAR(COUNTA(B1:ZZ1) + 65) & ROW()

Answer 3

You can try this arrayformula:
{=ADDRESS(ROW(B2),MAX(IF(ISEMPTY(B2:H2),0,COLUMN(B2:H2))))}
Validate with CtrlShiftEnter

Answer 4

If you are looking for the last cell with data, you can write a quick function and place it in a VBA module in your workbook.
Public Function LastCell(inRange as Range)
LastCell = inRange.End(XlToRight).Address
End Function
Or just omit the '.Address' if you want to get a range object pointing to the cell.
You can then use it in a formula like...
=LastCell(A1)
Regards
Ray