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What Are Functions?

You already learned in Lesson 4, "Performing Simple Calculations," how to create your own formulas in Excel. When you work with more complex calculations, you are better off using Excel's built-in formulas—functions.

Functions are ready-made formulas that perform a series of operations on a specified range of values. For example, to determine the sum of a series of numbers in cells A1 through H1, you can enter the function =SUM(A1:H1). Excel functions can do all kinds of calculations for all kinds of purposes, including financial and statistical calculations.


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