Similar question has been answered here:What_is_the_file_extension_for_Microsoft_excel_file
There are no set file extensions for an ASCII text file, however one that is commonly used is .txt
Default file format for Excel 2003: .xls Default file format for Excel 2007: .xlsx Note: You can't open lower version file format in upper version. If you want to do this then you will have to download the compatibility pack.
The default file name for all versions of Microsoft Excel is called "book1"
The default file ext for Excel 2010 default install is .xlsx as it was in 2007. 2003 was the last version with a different extension, which was .xls for workbooks.Te default file ext may be changed by going into File-> Options -> Save -> Save in this format.If there is a group policy in place, Excel will inherit the default file extension specified.
File extensions for web pages usually are .html.
A default filename is a name given to a file if you do not choose your own. In Excel the first default filename used is Book1.xls and your file will be called this if you don't specify another one.
The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.The default file is Book1 when you start. The extension is .xls for versions of Excel up to 2003 and from version 2007 onwards it would be .xlsx as the extension.
Excel 2003 and earlier: .XLS Excel 2007 and later: .XLSX
The xlsx file extensions are from Excel 2007 whereas xls is used in the earlier versions of Excel.Thanks
For a standard Excel document, prior to Excel 2007, it is xls and xlsx is used in 2007. There are other kinds of files created by Excel, like templates which can be xlt or macros which can be xlm and xla for Add-ins, and there are other extenions. For 2007, you add x to the end of them.
By default, text in Excel is left aligned.
By default, Windows hides the extensions of files when viewed in Windows Explorer and on the Windows desktop. You may unhide all known file types by opening Windows Explorer, selecting Tools > Folder Options, clicking the View tab, and removing the checkmark to ñhide file extensions for known files types.î