I have a column of data but I do not know how many cells in column. I want
to copy the last cell from this column. e.g.

Example 1
========
A1 = 412
A2 = 343
A3 = 434
A4 = <empty
A5 = 3432
A6 = 34
A7 = 3431
A8=<empty
A9=<empty
.....
and so on cells are empty
....

....

I want B1 = 3431 (A7) because it is the last cell with non empty content


Example 2
========
A1 = 412
A2 = 343
A3 = 434
A4 = <empty
A5 = 3432
A6 = 34
A7 = 3431
A8=123
A9=456
A10=<empty
A11=<empty
A12=<empty
---
and so on cell s are empty...

....

I want B1 = 456 (A9) because it is the last cell with non empty content


Thanks in advance.