Hi rammohan,

you have asked many questions in the last few days and have been pointed several times to good tutorials to help you learning Perl, but your new questions seem to show that you have not yet made the effort to read, understand and assimilate these tutorials. All of your recent questions show that you haven't grabbed the very basics of Perl, and you would have grabbed those if you had taken the pain to read seriously the tutorials that have been proposed to you. Please make the effort to read those. You should probably start with the perlintro document pointed out above by Ken.