Wow! when i run the following script then hello! can be seen inside "not.txt" file after once scrip is run

use strict;
use warnings;
use diagnostics;

open (FILEHANDLE, ">not.txt") or die ("Cannot open not.txt");
print FILEHANDLE "hello!";
close (FILEHANDLE);

[download]

it means book assumed me as knower of perl so it didn't mentioned to write 

use strict;
use warnings;
use diagnostics;

[download]

before that script.anyway in the book above example the line is" Here's an example in which we open a file for output and print some text to that file". So i think it just replaced(or write) that whole script into word "hello"! and if i write different word then that word will be there after scrip running.

In reply to Re^6: how to create a perl program using filehandle and streams ? by Monk_perl
in thread how to create a perl program using filehandle and streams ? by Monk_perl

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.