Go to the Formulas ribbon – choose either the Insert Function icon to bring up the Insert Function dialog box (same dialog box you would get with the first method), or click the arrow next to the correct category in the Function Library Group, and then choose the desired function.On the Home ribbon, click on the arrow next to the AutoSum icon and select More Functions.Once there, choose one of the methods below to insert your function: Before you do anything, make sure your cursor is in the cell in which you want the result.
There are several ways to insert functions.