# Sum

**Sum** may refer to any of the following:

1. In mathematics, a **sum** is the total obtained from adding numbers. For example, the sum of two and two is four.

2. **Sum** is chat slang for *some*.

3. In Microsoft Excel, **sum** is a formula function for adding the numerical value of cells. Below are examples of how the sum formula may be used.

`=SUM(A1, A10)`

— adds the values of cells A1 and A10.`=SUM(A1, A10, A20)`

— adds the values of cells A1, A10, and A20.`=SUM(A1:A10)`

— adds the values of all cells in the range from A1 to A10.`=SUM(A1:A10, B2:B11, C13)`

— adds the values of cells in the range A1:A10 and the range B2:B11 and the cell C13.`=SUM(A1, 30)`

— adds 30 to the value of cell A1.

When a formula is added to a cell, its results are what show in the cell.

## What is the Sum or AutoSum icon and its function?

In most spreadsheet programs, the Sum (sometimes called AutoSum) feature is represented by a Sigma (Σ) icon. In Microsoft Excel, the AutoSum or Sum icon and function allows you calculate a total for the values of selected cells quickly. When using Sum, the calculated total is displayed below the last selected cell in a column or to the right of the last selected cell.

The AutoSum and Sum functions are on the Home tab of the Excel Ribbon, in the *Editing* section.