Can somebody please suggest how I could dynamically update a variable's value in client's script,each time I call the server(which sends a value to client that is assigned to this client's variable).

for eg. If client has a variable $a=1, that it sends to server. server sends back client $t=2, that is assigned to $a of client.
Now when the same client establishes a connection with the server next time, it would send $a=2 ( and not $a=1).

for the following Server and Client codes:

#tcpserver.pl
use Switch;
use feature qw(switch say);
use IO::Handle;
use IO::Socket::INET;
$|=1;        
    
my ($socket,$client_socket);
$socket = new IO::Socket::INET ( #LocalHost => '127.0.0.1',
                                  LocalPort => '9000',
                                  Proto => 'tcp',
                                  Listen => 5,
                                  Reuse => 1) or die "ERROR in Socket 
+Creation : $!\n";
        
        while(1)
        {
            $client_socket = $socket->accept();
            while(defined(my $data=<$client_socket>))
            {
                $a=$data;
            }
            
            if($a eq 1)
            {
            $t=$a++;
            }
            $client_socket->shutdown(0);
            print $client_socket $t;
        }            
$socket->close();
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#tcpclient.pl
use feature qw(switch say);
use IO::Socket::INET;
use IO::Handle;
my($status,$md_self,@md_others);
    $|=1;
     $a=shift||1;                      
    my ($socket,$buffer);
    print "TCP Connection Success.\n";
    $socket = new IO::Socket::INET (PeerHost => '127.0.0.1',
                                    PeerPort => '9000',
                                    Proto => 'tcp',
                                    ) or die "ERROR in Socket Creation
+ : $!\n";
    # write on the socket to server.
    print $socket $a;    
    $socket->shutdown(1);
    $t=<$socket>;
    print $t;
    $a=$t;
    $socket->close();
[download]