I learned from some older books, and part of the conventional wisdom was to chomp all input, but I was looking at an example today, and it looks like some kind of "autochomp" is occurring. For instance, in the following code, $data clearly matches 2, but the 2 still has a newline on it, since when I print it without a newline, the newline is there. So why does "$data == 2" match? I would expect the hidden newline to interfere. I would expect "$data =~ /2/" to match; but == matching dosn't seem right to me. What am I missing? 
#!/usr/bin/perl
use strict;
use warnings;

while (my $data = <DATA>) {
#chomp $data; 
print $data;
if ($data == 2){print "->got 2\n"}
}

print "Enter a 2\n";
my $input = <>;
if ($input == 2){print "->got 2\n"}

__DATA__
1
2
3
4

[download]

In reply to Whatever happened to chomp? by zentara

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.