How to insert a function into a formula?

Question

Google Sheets

Everyone understands that in order to substitute the value of cell A1 into cell A2, it is enough to write a simple formula in cell A2: =А1.

How to change this simplest formula and “attach” the ROW function to it? It is very necessary that the line number is determined automatically. Or maybe there is another way?

Answer 1

Possibly
=ROW(A2)
Or something like
=INDIRECT("A" & ROW())