title: What is role of #!usr/bin/perl -n?
body: <p>What is the role of <code>#!usr/bin/perl -n</code>? I am tried to refer to the books and other sources but i am not get the better idea. It behave like the STDIN, for example <code>my @array = &lt;&gt;</code> many input is store into the <code>@array</code>. <code>-n</code> also behave like this but how to store the input value in data types.? And which is the original function? </p>