understanding files and filenames

What are the definition of file, filenames and extension?

A file is a collection of data or information that has a name, called the filename. Almost all information stored in a computer must be in a file. There are many different types of files: data files, text files , program files, directory files, and so on. Different types of files store different types of information. For example, program files store programs, whereas text files store.

A filename is the name of a file. All files have names. Different operating systems impose different restrictions on filenames. Most operating systems, for example, prohibit the use of certain characters in a filename and impose a limit on the length of a filename. In addition, many systems, including DOS and UNIX, allow a filename extension that consists of one or more characters following the proper filename. The filename extension usually indicates what type of file it is.

An extension An extra feature added to a standard programming language or system

What are the main types of files?
There are many different types of files: data files, text files , program files, directory files.

It is important because you will not know where you put your files, because it doesn't have a name.



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