FileNames
 Usage
• FileNames[ ] lists all files in the current working directory.
• FileNames["form"] lists all files in the current working directory whose names match the string pattern form.
• FileNames[{" ", " ", ... }] lists all files whose names match any of the  .
• FileNames[forms, {" ", " ", ... }] lists files with names matching forms in any of the directories  .
• FileNames[forms, dirs, n] includes files that are in subdirectories up to n levels down.
Notes
• The string pattern "form" can contain the metacharacters specified in Section A.3.13. • FileNames["*"] is equivalent to FileNames[ ]. • FileNames[forms, dirs, Infinity] looks for files in all subdirectories of the dirs. • The list of files returned by FileNames is sorted in the order generated by the function Sort. • FileNames[forms, dirs, n] includes names of directories only if they appear exactly at level n. • The forms can include relative or absolute directory specifications, in addition to names of files. • Setting the option IgnoreCase -> True makes FileNames treat lower- and upper-case letters in file names as equivalent. • On operating systems such as Microsoft Windows, FileNames always treats lower- and upper-case letters in file names as equivalent. • New in Version 2; modified in 4.
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