Insert Row based on Condition and add data in the newly created rows

Hello all,

I would like to know how to:

1. insert a row in between two rows that meet the following condition (example with rows 2 and 3): A2 < A3 - 1
2. when the row is added (let's name it row number K), I want to fill the cell AK with the following: value of AK = value of A(K-1) + 1
3. repeat this until for any row (number N) except the last one, I have the following: value of AN = Value of A(N+1) - 1

Example:

If my current sheet shows the following:

A1 = 8
A2 = 9
A3 = 15
A4 = 17
A5 = 18


I would like to get to this:

A1 = 8
A2 = 9
A3 = 10
A4 = 11
A5 = 12
A6 = 13
A7 = 14
A8 = 15
A9 = 16
A10 = 17
A11 = 18


(The cells in bold belong to the newly created rows)


Thank you

Perfect 10 !!

Thank you very much AlphaFrog

What if I want to add more data?

Ideally, I would like to the new row (N) to show this:

AN = A (N-1)
BN = B (N-1)
CN = C (N-1) + 1
EN = FN = GN = 0
HN = H (N-1)
IN = I (N-1)

Sorry, I'm new to this.

I want to change the condition (mentioned in bullet point n°2 in my first message) to something more complex.

For example if a row is inserted between rows 3 and 4 I would like the new row 4 to show the following:

A4=A3
B4=B3
C4=C3 + 1
E4=G4=H4=0
F4=F3
I4=I3
J4=J3


Thanks

Absolutely amazing!

Many thanks AlphaFrog.