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I'm using the following formula to create an auto increment to form responses. I need the starting value of "100000" and all subsequent values to be a number, not a string.

Formula

=arrayformula( if( len(A2:A), text(row(A2:A) - row(A2) + 1, "100000"), iferror(1/0) ) )

How can I update the above formula so it outputs a number value, not a string showing a number?

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  • Yes. Then I use =ISNUMBER(E2) to test it and get "false". I need to figure out how to return the auto increment number as a 'value'.
    – Mr. B
    Sep 7, 2016 at 2:37
  • Column is the time/date stamp from a Google Form submission. This formula is in an empty column (G) and all it does is place an auto increment number in the cells 'when' something appears in column A.
    – Mr. B
    Sep 7, 2016 at 2:54

1 Answer 1

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Short answer

To numerate rows in a table, like the form responses, starting on 100000, use the following formula:

=FILTER(ROW(A2:A) - 2 + 100000,LEN(A2:A))

Explanation

  • ROW(A2:A) - 2 returns a array of consecutive numbers starting on 0.
  • + 100000 makes that the array of consecutive numbers start on 100000.
  • LEN(A2:A) as the filtering criteria argument of FILTER, makes that only the rows with responses be numerated.
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