Python the Hard Way - exercise 6 - %r versus %s
<p><a href="http://learnpythonthehardway.org/book/ex6.html" rel="nofollow">http://learnpythonthehardway.org/book/ex6.html</a></p>

<p>Zed seems to use <code>%r</code> and <code>%s</code> interchangeably here, is there any difference between the two? Why not just use <code>%s</code> all the time?</p>

<p>Also, I wasn't sure what to search for in the documentation to find more info on this.  What are <code>%r</code> and <code>%s</code> called exactly? Formatting strings?</p>
