Editing Reduce (computer algebra system) (section)

=== Hello World programs ===
Below is a REDUCE [["Hello, World!" program]], which is almost as short as such a program could possibly be!
<syntaxhighlight lang="octave" copy>
"Hello, World!";
</syntaxhighlight>
REDUCE displays the output
<div class="center" style="width: auto; margin-left: auto; margin-right: auto;">
Hello, World!
</div>
Another REDUCE "Hello, World!" program, which is slightly longer than the version above, uses an identifier as follows
<syntaxhighlight lang="octave" copy>
!Hello!,! !World!!;
</syntaxhighlight>
CSL REDUCE displays the same output as shown above. (Other REDUCE GUIs may italicise this output on the grounds that it is an identifier rather than a string.)