in c1
=if(A1=4,B1,"")

then drag fill down the column

another interpretation would be

=sumif(A:A,4,B:B)

--
Regards,
Tom Ogilvy

"Heather" wrote:

Is there a way to make a column add only certain amounts that correspond with
a particular number in another column. For example:

I would like for numbers in column B add if they have a number 4 in the same
row in column A. Make that amount show in a cell in column C.

Thanks for any help!