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This method is used to copy an existing file.
copy(source,destination)
Source −The source filename to be copied.
Destination −The target path and name of the file.
None
-module(helloworld).
-export([start/0]).
start() ->
file:copy("Newfile.txt","Duplicate.txt").A file named Duplicate.txt will be created in the same location as Newfile.txt, and it will have the same content as Newfile.txt.