XP Introducing Functions Function – Named operation that returns a value – Simplifies a formula, reducing a long formula into a compact statement; for example, to add values in the range A1:A10: Enter the long formula: =A1+A2+A3+A4+A5+A6+A7+A8+A9+A10 - or - Use the SUM function to accomplish the same thing: =SUM(A1:A10) New Perspectives on Microsoft Office 201031
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