I have following code
#!/usr/bin/perl
  $startDir = q{c:\test};
$newDir = q{c:\new};
  &myReadDir($startDir);
  exit 0; 
   
  sub myReadDir
{
        my ($dir) = @_;
        my (@dirs,$list);
        opendir(DIR,$dir) || warn "can't open the directory $dir: $!\n
+";
        @dirs=grep {!(/^\./) && -d "$dir\\$_"} readdir(DIR);        
        closedir (DIR);
        for $list(0..$#dirs)
        {
                mkdir ($newDir) unless -d $newDir;
                $ndir = $dir;
                $ndir =~ s/c:\\test/c:\\new/;
                print $ndir."\\".$dirs[$list],"\n";
                mkdir ($ndir."\\".$dirs[$list]);
                &myReadDir($dir."\\".$dirs[$list]);
        }
        return 1;
}

[download]
&myReadDir($startDir);
what does & mean in this line of code ? If I want to use subroutine, I just need to use it as myReadDir($startDir). What is "&" used for as prefix ?

my ($dir) = @_;
Why is variable $dir surrounded by () ?

my (@dirs,$list);
What does this code do ? Usually we declare list in bracket on right hand side and that contains values. What does this code do ? Where can I find more details about this code ?

In reply to please explain some code by manishrathi

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