Opening a File

• To read or write to a file, you must first open it.
• Four things to do:
• Use the open keyword.
• Assign a file handle, which acts as an alias for the file.
• Use the alias to open, close, and write to the file.
• Determine read, write, append.
• read: <
• write (overwrite existing contents): >
• append (do not overwrite existing contents): >>
• Give the name and location of the file.
open(FILEHANDLE, "RWFLAGFILENAME");
open(DATA, ">>../userdata.txt");