Get next unused sequence number in a group of numbers

[Sahak]

Hi All,

I have tried (on line) to find answer to my question but instead totally confused.
I would like to Get next unused sequence number

10223
10224
10229
10304

I need to get 10225

Yhank you in advance.

 

[Rick Rothstein]

Hi All,

I have tried (on line) to find answer to my question but instead totally confused.
I would like to Get next unused sequence number

10223
10224
10229
10304

I need to get 10225

Assuming your sequence numbers never start with 0, are in sequential order and are in cells (A1:A4 for your posted example), then here is a UDF (user defined function) that will return the number you want...

Function NextSeqNum(Rng As Range) As Long
  Dim R As Long, Data As Variant
  Data = Range("A1", Cells(Rows.Count, "A").End(xlUp).Offset(1))
  For R = 2 To UBound(Data)
    If Data(R, 1) <> Data(R - 1, 1) + 1 Then
      NextSeqNum = Data(R - 1, 1) + 1
      Exit Function
    End If
  Next
End Function

HOW TO INSTALL UDFs
------------------------------------
If you are new to UDFs, they are easy to install and use. To install it, simply press ALT+F11 to go into the VB editor and, once there, click Insert/Module on its menu bar, then copy/paste the above code into the code window that just opened up. That's it.... you are done. You can now use NextSeqNum just like it was a built-in Excel function. For example,

=NextSeqNum(A1:A4)

If you are using XL2007 or above, make sure you save your file as an "Excel Macro-Enabled Workbook (*.xlsm) and answer the "do you want to enable macros" question as "yes" or "OK" (depending on the button label for your version of Excel) the next time you open your workbook.

 

[Sahak]

Thank you Rick VERY MUCH.