title: In an R interactive session, how can I access the value of the most recent expression?
body: <p>When I'm in an interactive session with R and I type a command (e.g., log(25)), the interpreter displays the result</p>
  <pre><code>&gt; log(25)
  [1] 3.218876
  &gt;
  </code></pre>
  <p>is that result available as the value of some special variable that I can use on the next line?</p>