A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
An apostrophe before a cell value forces Excel to interpret the value as text. This is mostly useful for values that look like a number or date.
For example, Dec-1 would ordinarily be converted to a date in December. If you want the literal text Dec-1, enter it as 'Dec-1.
In formulas that refer to another sheet whose name contains spaces, the sheet name is enclosed in apostrophes. For example: ='Other Sheet'!A1