See this article - note the warnings

That link also contains links to numerous example programs. I'm not here to do your homework for you. But I will be happy to help you troubleshoot code you have written.

Infact my problem is something else. If i am able to get the logic for the question i have asked for, i would be able to resolve. As far i came till now on this. Just incase if you would like to help.!

use warnings;
use Spreadsheet::ParseExcel::SaveParser;

my $parser = Spreadsheet::ParseExcel->new();
my $workbook = $parser->parse('Test.xls');

my $worksheet = $workbook->worksheets(1);
my $row = 4;
my $col = 5;
my $cell = $worksheet->get_cell( $row, $col );
#print $cell,"\n";
print "value = ",$cell->value(), "\n";
my $cell_value = cell->value();

if($cell_value < 0 ) {
    $cell_value = 0;
}


$workbook->SaveAs( 'Test_Parse.xls' );
[download]

Looks good. To make the change to the worksheet, you need to add

$worksheet->write($row,$col,$cell_value);
[download]

I can't be sure that's exactly right, since I don't have those Spreadsheet modules installed. But it should be close.

Dum Spiro Spero