Thanks for your reply .It works.
use Data::Dumper qw(Dumper);
use strict;
use warnings;
use List::Compare;
open F,"<","C:/Users/jeyakuma/Desktop/file1.txt" ;
open S, "<","C:/Users/jeyakuma/Desktop/file.txt" ;
my $str = <F>;
my $str1=<S>;
my @old = split / /, $str;
my @new=split / /, $str1;
my $lc = List::Compare->new(\@old,\@new);
my @intersection = $lc->get_intersection;
my @firstonly = $lc->get_unique;
my @secondonly = $lc->get_complement;
print "Present only in old dump data@firstonly\n";
print "Present only in new data @secondonly\n";
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