m!<NumberofDays>\d+</NumberofDays>!gm;
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This is what I have so far ..I am still working on it 

#!/usr/bin/perl

my $dir = "/tmp/asheesh";
my gdir = "$dir/temp";

opendir (DIR, $dir) or die "can't open dir";
@files = readdir(DIR);
closedir DIR;

foreach $files(@files)
 {
   unless ( $files eq "." || $files eq "..")
     {
        open (FILE, "$files") or die "can't open file";
        @Lines=<FILE>;
        close FILE;
        foreach  $Lines(@Lines)
         {
           chomp $Lines;
           
if ( $Lines eq "<NumberofDays>\d+</NumberofDays>" )
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Hi, you're code:

if ( $Lines eq "<NumberofDays>\d+</NumberofDays>" )
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should be something like:

if ( $Lines =~ m|<NumberofDays>(\d+)</NumberofDays>| )
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3 differences between your and my line:
• eq vs. =~
to compare against a regular expression you use =~
• the regular expression is in 'm|' and '|' characters
This is to make clear you are using a regular expression
• the \d+ is in '(' and ')' characters
This is used to 'capture' the value of the expression inbetween them. In this case it would capture the value in $1. The rule is the first ()-match is captured in $1, the second in $2 etc. So in your code you could continue with something like

print $1
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Hope this helps getting you started. For documentation on regular expressions there are 2 good tutorials that come with perl that were not mentioned here: perlrequick perlretut

You need a regular expression in your if-test. Start by doing:

   perldoc perl
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at a command prompt. You'll notice if you page down a little that there are these 2 perldocs listed for regular expressions:

   perlre              Perl regular expressions, the rest of the story
   perlreref           Perl regular expressions quick reference
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So, if you want to read the 1st one, you would do

   perldoc perlre
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at a command prompt. The 1st response to your question gave you a regular expression to try. Read the perldocs, try a regular expression, and post back if you still have problems.

HTH.