How to undo deleting a tab in Excel

An Excel file is called a workbook and it contains multiple worksheets. The number of worksheets in a workbook is limited only by the memory of your computer. Worksheets are also known as tabs because of how they are displayed in the workbook. You may accidentally delete a tab or sheet from a workbook and then need to recover it or undo the deletion.  When you delete a tab or sheet, it is permanently deleted. There is only one way to restore the sheet.