Setting a cell to a value of another cell IF another cell was value X

Question

Is there a formula in excel to allow you to obtain the value of another cell WHEN a second cell was value X?

For example, something like:

=GETWHEN(A1,3,B2)

Which would return B2's cell value when A1 is value 3.

So if let's say you had a cell B2=4*B1. And B1 you set to 3, so B2 would show 12. But I want to make a row of entries to plot what B2 will be when A1 is 1, 2, 3, 4, 5 etc...

What could I put under A1 Values?

EDIT: I'm not looking for a if like in the conditional sense. I'm looking for the value WHEN (edited now)

Answer 1

You're thinking about data tables .

Provided you have your values in E2:E6 , and your formula in B2 :

• Enter =B2 in cell F1.
• Select E1:F6 .
• Go Data - Data table and put B1 into the Row input cell box (B1 being the cell on which B2 depends).