I changed the order of the program execution to resolve this problem but i have one more question now...I am doing a check on $choice for value 1 or 2 ,if not print "INVALID CHOICE" and then exit the program.Is there a way to ask the user to re-enter the choice rather than exiting the program?

print "\nEnter your choice: ";
my $choice = <>;
chomp ($choice);

if($choice != (1||2)){
    print "/*******************************************************/\n
+";
    print "INVALID CHOICE\n";
    print "/*******************************************************/\n
+";
    exit;
}
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OR (or || ) with a negative can be very confusing... and in your sample, would not do what you want. You want the user who enters anything other than "1" or "2" to be reprompted... so you want

if ( $choice != 1 && $choice != 2 ) {

As for a way to do it (just one of many, and one about which some purists will howl) is with a label and a goto:

#!/usr/bin/perl
use strict;
use warnings;

# 875438

START: print "\nEnter your choice: ";
my $choice = <>;
chomp ($choice);

if ( $choice != 1 && $choice != 2 ) {
    print "INVALID CHOICE\n";
    goto START;
} else {
    print "\$choice: $choice \n";
}
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When executed, you'll see:

>pl_test/875438.pl

Enter your choice: 4
INVALID CHOICE

Enter your choice: 3
INVALID CHOICE

Enter your choice: 2
$choice: 2

>
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A better option might be to re-reorganize your program; test the $choice and if you have a 1 or a 2, do whatever it is that you want; then elsif and reprompt there.

I think I will use this.Thanks,