Using file handle variable

    

open FILEHANDLE, "<file.txt" or die "Can not open file";

*FILEHANDLE2 = *FILEHANDLE;

while (<FILEHANDLE2>) {
    print;
}

1.	Select a file handle
2.	Pass file handle reference in a the form of '*FILEHANDLE{IO}'
3.	Pass file handle reference to a subroutine
4.	Pass file handle to stat function
5.	Passing Filehandles by Reference
6.	Passing file handles to functions
7.	Filehandle References
8.	Split a file handle containing array
9.	undef file handle
10.	defined lines in a file
11.	Using a scalar variable to store a file variable name.
12.	Using while loop to read content
13.	Redirects the standard output and standard error files.
14.	To write to a file:
15.	Passing file name to functions

Using file handle variable : file handle « File « Perl