Final answer:
The AutoSum shortcut is used in spreadsheet software to quickly calculate the sum of a selected range of cells by pressing the AutoSum button or using the keyboard shortcut Alt + =.
Step-by-step explanation:
The AutoSum shortcut in spreadsheet programs like Microsoft Excel can be used to quickly calculate the sum of a range of cells. To use the AutoSum shortcut, first select the cell where you want the total sum to appear. Then, press the AutoSum button (usually represented by the Σ symbol) or use the keyboard shortcut Alt + =. The program will automatically detect the range of cells you likely want to sum and insert the SUM formula. After checking that the range is correct, press Enter to apply the formula and display the result.