How do I set up a column to automatically number the next row

[Monique]

I am trying to upload a great deal of vendors into a new accounting package,
but I cannot use the old vendor number format in the new software. I would
like Excel to automatically assign vendor numbers based on the first letter
of the vendor name. Taking that letter and simply add one number to the
previous vendor. Such as A000001, then A000002, etc.

 

[JW]

Not sure exactly how you have your spreadsheet setup, but this will
take the first letter of the name in column B and then increment the
number above it by one. This is assuming that you're vendor numbers
are in column A and your vendow names in column B.
=LEFT(B11,1) & TEXT(RIGHT(A10,6)+1,"000000")

Now, that will work, but not the best way, IMO. I would use something
like this so that you don't have to tweak the formula any when the
first letter of the company name changes.
=IF(LEFT(B12,1)=LEFT(A11,1),LEFT(B12,1)&TEXT(RIGHT(A11,6)+1,"000000"),LEFT(B12,1)
& TEXT(1,"000000"))

 

[JW]

Forgot to mention, the formulas would be entered into column A. For
instance, the formula below would be entered into A12.
=IF(LEFT(B12,1)=LEFT(A11,1),LEFT(B12,1)&TEXT(RIGHT(A11,6)+1,"000000"),LEFT(B12,1)
& TEXT(1,"000000"))

 

[JLGWhiz]

Assume Col A is the column to be numbered. Type 1 in the cell you want to
begin the numbering sequence in. Then, say your first cell is A3 put this in
the next cell and copy down the column:

=If(B3>0, A3 + 1, "")

The cells in column A will remain blank until you enter something in column
B of the previous row.

 

[JLGWhiz]

disregard that, I misread your post.