For the most part, file extensions consist of three characters, which are typically letters or digits, that textually represent the type of file it is. There are no particular rules regarding how an extension should be formatted other than it must begin with a period and have at least one character after it. This extension allows the operating system to know what type of file it is and what program to run when you double-click on it. File Type or File extension is the letters immediately shown after the last period in a file name.įor example, the file extension.txt has an extension of. You can set the default apps by file Type also. If you don’t like Edge you choose any other browser.
For example, by default, the Browser is set to the edge. Here you can choose your own default apps for your choice. Click on Start and setting–> Go to the Apps–>Open Apps and Choose Default Apps.
