How to use the SUM function in Microsoft Excel?

 The SUM function in Excel is one of the most frequently used basic mathematical functions. It is used to add numbers in one or several cells or cell ranges.

Here are the detailed steps to use the SUM function in Excel:

1. Open the Microsoft Excel application and create a new worksheet.
2. Select the cell where you want to display the sum.
3. Type the equal sign (=) in that cell.
4. Type the word "SUM" (without quotes) followed by an opening parenthesis.
5. Select the cell or cell range that you want to add. You can select cells manually or use a named range if you have named the cell or cell range.
6. After selecting the cell or cell range, close the parenthesis by typing the closing parenthesis ().
7. Press the "Enter" key to complete the formula and display the sum.
8. Example: If you want to add the numbers in cell A1 and B1, you can type the formula =SUM(A1:B1) in the cell where you want to display the sum.

In addition, you can also use the SUM function to add multiple cell ranges at once. For example, if you want to add the numbers in cell A1 through A5 and B1 through B5, you can type the formula =SUM(A1:A5,B1:B5) in the cell where you want to display the sum.

Furthermore, you can also use the SUMIF and SUMIFS functions in Excel to add cells or cell ranges with specific criteria. The SUMIF