### Theory:

LibreOffice Calc allows you to generate auto numbers.

To generate auto numbers, follow the steps given below.
• Click the LibreOffice Calc Spreadsheet from the LibreOffice Start Centre.
• By default, you always get a workbook (sheet $$1$$) when you open the LibreOffice Calc application.
• Enter the first two numbers of the series in two cells.
• Select both the cells.
• Move the cursor to the right side bottom of the cell. The cursor will change to the plus sign.
• Drag the plus sign to the desired cell.
• The numbers will be generated automatically. You can generate any series by using this method.