Select Code to Download

Name   Age  Regn No.
 A     50    r1
 B     40    r2  
 C     30    r3

#!/usr/bin/perl 
use warnings;   
################################################
...
        print "    Age: " . $studentsDB{$id}{Age} . "\n";  } } 
     } } until ($entry==3); 
exit;

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
C:\Users\x>cd desktop
...
Use of uninitialized value $reg_no in hash element at C:\Users\x\Deskt
+op\d2.pl line 52, <STDIN> line 17.

 Enter the Regn Number for detailed information: