The extension follows the last dot in the name. It guides the operating system but does not define the content: renaming a file never changes its format.
File extension
The suffix of a file name that tells the system which program to use.
The suffix of a file name that tells the system which program to use.
The extension follows the last dot in the name. It guides the operating system but does not define the content: renaming a file never changes its format.
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