What is a file name Extension:
A file name extension is a suffix (separate from the base file name by a dot) to the name of the computer file. A file name extension is a set of characters that helps Windows understand what kind of information is in a file and what program should open it. It is called an extension because it appears at the end
of the file name.
E.g. If a file has name xxx.txt then its extension is txt and Notepad or any other text editor is required software to open that.
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Note: If we change the extension of the file name then its required program may fail to open it.
How to enable Disable the view of Extension of file name in windows 7 and Xp
1. Click "Tools" on the menu bar and select "Folder option".
2. Navigate to "view" tab.
3. Under "Advanced setting" you will find an option "Hide extensions for known file types"
- To hide file extensions, select the Hide extensions for known file types in the check box.
- To display file extensions, clear the Hide extensions for known file types in the check box.
4. Now "Apply the Changes" and Click on "OK". That is it.
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