Case Function Equivalent in Excel

Question

I have an interesting challenge - I need to run a check on the following data in Excel:

|   A  -   B  -   C  -  D   |
|------|------|------|------|
|  36  |          


        

Answer 1

Try this;

=IF(B1>=0, B1, OFFSET($X$1, MATCH(B1, $X:$X, Z) - 1, Y)

WHERE
X = The columns you are indexing into
Y = The number of columns to the left (-Y) or right (Y) of the indexed column to get the value you are looking for
Z = 0 if exact-match (if you want to handle errors)