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I have a table which looks like this:

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And formula in cell B3: =IF(A3>5, B2, B2+1) and on every next row a corresponding variation of this formula.

I would like to know how to create ArrayFormula variant of this formula:

=IF(A3>5, B2, B2+1)

spreadsheet sample here

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  • Allen, in the meantime, your sample sheet is "View Only." Please change the permissions to "Anyone with the link can Edit." – Erik Tyler Jan 24 at 14:21
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    @AllenSierra LEN counts how many characters are in cell. =ARRAYFORMULA(IF(LEN(A1:A), true, false)) checks every row in given range if its empty/not-empty. in other words this works like some check-in restriction. kinda same as =ARRAYFORMULA(IF(A1:A<>"", true, false)) – user0 Jan 24 at 21:01
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    As a fail safe, I've gone ahead and uploaded a formula into your sample sheet, Sheet2!B1: =ArrayFormula({"Result";IF(A2:A="","",COUNTIFS(ROW(A2:A),"<="&ROW(A2:A),A2:A,"<=5"))}) – Erik Tyler Jan 24 at 21:41
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    @Allen, my formula results in a match to the image you posted in the original post. I'll wait for a reply to this point before I explain the formula. – Erik Tyler Jan 26 at 4:07
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    @Allen, in addition to my formula producing results that match the image in your original post, the formula in your original post says (in English), "If the value in A is greater than five, don't add anything to the previous value; otherwise, add one." – Erik Tyler Jan 26 at 4:50
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=ArrayFormula({"Result";IF(A2:A="","",COUNTIFS(ROW(A2:A),"<="&ROW(A2:A),A2:A,"<=5"))})

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probably not the answer OP is looking for, but here are some examples how to construct ARRAYFORMULA from =IF(A3>5, B2, B2+1)

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