title: RStudio does not display any output in console after entering code
body: <p>The problem is that when I run the code, there's no return in the console; I mean it does run the code, but does not return any output.</p>
  
  <p>For example, if I write</p>
  
  <pre><code>v &lt;- c(1, 2, 3, 4, 5)
  v
  </code></pre>
  
  <p>I would expect in return</p>
  
  <pre><code>[1] 1 2 3 4 5
  </code></pre>
  
  <p>But it's not working.</p>
  
  <p>I have version RStudio Version 0.98.1079 and R Version 3.1.1</p>