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Add the values in a column or row by using a button. You can use AutoSum to quickly sum a range of numbers in a column or row. Click an empty cell below a column of numbers or to the right of a row of numbers, and then click AutoSum. Excel selects what it determines to be the most likely range of data.
You can also create a formula by using a function. For example, the formulas =SUM(A1:A2) and SUM(A1,A2) both use the SUM function to add the values in cells A1 and A2. In addition to formulas that use a single function, you can create formulas with nested functions or arrays that calculate single or multiple results.lick the cell in which you want to enter the array formula. Enter the formula that you want to use. Tip Array formulas use standard formula syntax. They all begin with an equal sign, and you can use any of the built-in Excel functions in your array formulas.