Question

I want to make a cell equal to the cell above it.

When I write

=address(row()-1;column())

It just writes the name of the cell above(for example for B2 it writes $B$1)

Is there a function which inputs the address and puts the value?

Answer 1

Try using the OFFSET function to offset the cell by -1 row.
For example you can paste the below formula into cell A2 and it will return the value of A1:

=OFFSET(A2,-1,0)

If, however, you really want to keep your present address method, put it inside of the INDIRECT function like this:

=INDIRECT(ADDRESS(ROW()-1,COLUMN()))