About Formulas

Formulas, of course, are what make a spreadsheet a spreadsheet. If it weren't for formulas, your worksheet would just be a static document - something that could be produced by a word processor that has great support for tables.

Excel has a huge assortment of built-in functions, has excellent support for names, and even supports array formulas (a special type of formula that can perform otherwise impossible calculations).

A formula entered into a cell can consist of any of the following elements:

■ Operators such as + (for addition) and * (for multiplication)

■ Cell references (including named cells and ranges)

■ Numbers or text strings

■ Worksheet functions (such as SUM or AVERAGE)

A formula in Excel 2007 can consist of up to 8,000 characters. After you enter a formula into a cell, the cell displays the result of the formula. The formula itself appears in the formula bar when the cell is activated.

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