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# Naming Cells

## Allowed names

Names in Calc can contain letters, numeric characters, and some special characters. Names must start with a letter or an underline character.

Allowed special characters:

- underline (_)

- punto (.) - permitido dentro dun nome mais non como primeiro ou derradeiro carácter

- blank ( ) - allowed within a name, but not as first or last character, and not for a cell range

Names must not be the same as cell references. For example, the name A1 is invalid because A1 is a cell reference to the top left cell.

Names must not start with the letter R followed by a number. See the ADDRESS function for more information.

Names for cell ranges must not include blanks. Blanks are allowed within names for single cells, sheets and documents.

## Naming cells and formulas

A good way of making the references to cells and cell ranges in formulas legible is to give the ranges names. For example, you can name the range A1:B2 Start. You can then write a formula such as "=SUM(Start)". Even after you insert or delete rows or columns, LibreOffice still correctly assigns the ranges identified by name. Range names must not contain any spaces.

For example, it is much easier to read a formula for sales tax if you can write "= Amount * Tax_rate" instead of "= A5 * B12". In this case, you would name cell A5 "Amount" and cell B12 "Tax_rate."

Use the Define Names dialog to define names for formulas or parts of formulas you need more often. In order to specify range names,

1. Select a cell or range of cells, then choose Sheet - Named Ranges and Expressions - Define. The Define Names dialog appears.

2. Type the name of the selected area in the Name field. Click Add. The newly defined name appears in the list below. Click OK to close the dialog.

You can also name other cell ranges in this dialog by entering the name in the field and then selecting the respective cells.

If you type the name in a formula, after the first few characters entered you will see the entire name as a tip.

- Press the Enter key in order to accept the name from the tip.

- If more than one name starts with the same characters, you can scroll forward through all the names using the Ctrl + Tab keys and backward using the Shift + Ctrl + Tab keys.

Temas relacionados

Sheet - Named Ranges and Expressions - Define

Applying Goal Seek

Addresses and References, Absolute and Relative

Recoñecer nomes como referencia