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What is a file extension used for?

Anonymous

∙ 16y ago

Updated: 11/12/2022

A file extension indicates what type of file it is. For instance .doc is a word document, .jpg is a picture. Google file extensions and you should be able to get a list of all the file extensions and what they mean.

Wiki User

∙ 16y ago

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More answers

A file extension is used to identify to the computer and to the user what the type of file is. For example, if one sees a file such as MyProg.pas, this can be identified as a Pascal source code file. On the other hand, if the file is named XMas2014.jpg, then this is a JPEG picture. The extension is a way for the computer to know how to open the file when it is double-clicked. So, when you double-click the aforementioned JPEG picture, it will open in whatever program is set to be the default for that type of file (Windows Fax and Picture Viewer, for example).

Does this help or do you have other questions? Feel free to drop me a line if I can assist you further.

Wiki User

∙ 10y ago

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