produces a sequence of octets ENCODED as Latin-1 for code points 0 - 255

It gives the same result, yes, but only by virtue of Unicode code points being rather similar to iso-latin-1, not because print does any encoding.

print does this: 

- If any of the elements of the string is larger than 255,
  - Warn "wide character".
  - Encode the string using utf8.

- For each element of the string,
  - Print that number as a byte.

[download]

The operator plus expects numbers, just like print, right?

Two individual numbers, yes. print takes two strings of them. The bitwise operators accept either. 

$ perl -E'say "ABC" | "   "'
abc

[download]

In reply to Re^6: Default encoding rules leave me puzzled... by ikegami
in thread Default encoding rules leave me puzzled... by kzwix

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.