### What is a Function in Microsoft Excel?

**Microsoft Excel provides a large number of Functions for processing data**in Excel Worksheets easily.

__Functions are predefined formulas__in Excel. These functions are used in different types of calculations on numerical or other data quickly.

### How a Function is Used in Microsoft Excel?

There are three popular ways to use built-in functions in Microsoft Excel.1. Type Functions Manually

2. Use Function Library Commands

3. Use Insert Function Dialogue Box

## Other Microsoft Excel Topics on www.ComputerGap.com

Using Simple Formulas in Excel With Arithmetic Operators 2

### 1. Type Functions Manually

You can type a function manually in the required cell. First of all press Equal key from keyboard. Then start typing function name, for example, type SUM. A formula autocomplete list box will be displayed. Press TAB key when SUM is selected in the autocomplete formula list box. Type cell reference of first cell, suppose A1, type a colon ( : ). Type the cell reference of the last cell, suppose A4 as shown in the figure. Press Enter. You will see the result 100 in this cell.How Functions are used in Microsoft Excel Quick and Easy Way 3 |

A function is used by its name and providing some arguments to the function. The arguments are the necessary data values for calculation. Moreover, there is an EQUAL sign before every function name.

Notes on Microsoft Excel Functions - SUM function |

### General Syntax of a Function in Microsoft Excel

=FunctionName(Argument1, Argument2,...)

Arguments can be numbers in mathematical functions or cell references etc. If the cell references are used the syntax becomes

=FunctionName(CellRef1:CellRef2)

where CellRef1 represents the cell reference of the first cell in the range and CellRef2 represents the cell reference of the last cell in the range. For example in the given figure,

=SUM(A1:A4)

### 2. Use Function Library Commands

Another way to insert a function in a cell is to use the icons in the Formulas each of which is a drop-down control.

When you select a function from one of these lists, Excel displays its Function Arguments dialog box to help you enter arguments. The rest of the procedure is the same as in first method.

Notes on using Microsoft Excel Functions |

### 3. Use Insert Function Dialogue Box

Notes on using Microsoft Excel Functions - How to Use Insert Function Dialog Box in Microsoft Excel |

**Using the Insert Function dialog box**ensures that you spell the function correctly and that it contains the proper number of arguments in the correct order. Select a suitable category of the function, for example, if you want to

**then it will be found in Math & Trig category of functions. Search and select the function SUM and click on OK button. Now Function arguments dialog box will open, type suitable arguments.**

__use SUM function__To insert a function,

**, as shown in Figure**

__select the function from the Insert Function dialog box__You access this dialog box by

- Choosing Formulas, Function Library,Insert Function
- Choosing Formulas,Function Library, AutoSum, and then clicking More Functions in the

drop-down list

In

**Function Arguments dialog box**, you can enter the

**cell reference**of first cell and a colon ( : ) and the cell reference of the last cell to add all the numbers in the cells between these two cells including, as shown in the figure. After giving argument values click on Ok button and the result 100 will be shown in the required cell.

Using Simple Formulas in Excel With Arithmetic Operators 2

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