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Editorial Team
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Asked: 2026-06-04T15:35:12+00:00

I have 3 columns of data. Column B holds some data about tasks, column

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I have 3 columns of data. Column B holds some data about tasks, column C holds data about who’s doing it. In column B there will be a heading of the main task and underneath will be subtasks.

What i want to do in column A is look at C1 which is blank and in A1 0. When i copy down, it A2 will look at C2, sees something is in there, looks at A1 and sees that 0 is in there and puts 1 in A2.

A3 will look at C3, see data there, look at A2 and see that it is greater than 0 and add 1 to whatever is in A2 and so on.

I’ve tried for ages using different combinations of formula but i can’t get it right.

Anyone did this before and how?!

Screenshot and data layout

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1 Answer

  1. Editorial Team

    The key is to start the formula at A2 rather than A1. In A1, enter 0. In A2, enter the following formula and fill down.

    =IF(C2="",0,A1+1)

    EDIT:

    Based on your screen capture, this will give you exactly what you have there.
    Leave A1 blank. Then in A2 enter the following and fill down.

    =IF(C2="","",IF(A1="",1,A1+1))
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