find a row index of a number that occurred first

Question

I have A column that has values in random order like

       A column
           2
           3
           4
           2
           5
                  


        

Answer 1

My examples are looking for the number 3 but it is easy to adapt.

To find the first occurence, you can use:

=MATCH(3,A:A,0)

To find the last one, you can use an array formula (validate with Ctrl+Shift+Enter)

{=MAX(IF(A1:A10=3,ROW(A1:A10),0))}

Note that you could also have used an array formula for the first one with a MIN but it would be quite complicated for what it's worth.