You don't give much in the way of specifics, but if you check Help for
SUM and SERIESSUM, you might get a handle on it.

Jerry

Maria Garcao wrote:

Does Excel have a "sigma" function . . . i.e. I want to sum all the values
of a formula over a range of values (z = 1 to n). Ideally, I would like to
do this within a single function, rather than externalize the range of
values in the spreadsheet and then sum those values.

Any help or suggestions would be appreciated.