To fill out a whole row using a formula in Google Sheets, you can use the following methods:
1. AutoFill: Enter the formula in the first cell of the row, then drag the AutoFill handle (small blue square at the bottom right corner of the cell) across the row to apply the formula to all cells.
2. ArrayFormula: Use an ArrayFormula, which applies a formula to an entire range. Start with =ArrayFormula(your_formula), and it will automatically fill the entire row.
3. Copy and Paste: Enter the formula in the first cell, copy it (Ctrl+C or Command+C), select the entire row (Ctrl+A or Command+A), and paste (Ctrl+V or Command+V).
4. Formula with Array Notation: Use an array notation like =your_formula:Array(A1:Z1), replacing A1:Z1 with your desired range.
5. Drag and Drop: Enter the formula in the first cell, select the cell, and drag it across the row to apply the formula.
Note: Make sure to adjust the formula to reference the correct cells and ranges for your specific use case.
Example: If you want to fill out a row with a simple formula like =A1*2, you can use any of the above methods to apply it to the entire row.