define Sum() function
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The Microsoft Excel SUM function adds all numbers in a range of cells and returns the result. The SUM function is a built-in function in Excel that is categorized as a Math/Trig Function. ... As a worksheet function, the SUM function can be entered as part of a formula in a cell of a worksheet.
The SUM function adds values. You can add individual values, cell references or ranges or a mix of all three. For example: =SUM(A2:A10) Adds the values in cells A2:10. =SUM(A2:A10, C2:C10) Adds the values in cells A2:10, as well as cells C2:C10.
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