#command line passed to the terminal
> cl_args.pl myfile1.txt myfile2.txt myfile3.txt

##</code><code>##

# cl_args.pl
use strict;
use warnings;
@ARGV == 3 and print @ARGV;

# @ARGV is an array that can be be assigned to within your script
@ARGV = ( 'myfile4.txt' );
@ARGV == 1 and print @ARGV;