title: in R, can I stop print(cat("")) from returning NULL? and why does cat("foo") return foo>
body: <p>If I enter</p>
  
  <pre><code>print(cat(""))
  </code></pre>
  
  <p>I get </p>
  
  <pre><code>NULL
  </code></pre>
  
  <p>I want to use <code>cat()</code> to print out the progress of an R script, but I don't understand why it is returning <code>NULL</code> at the end of all of my concatenated strings, and more importantly, how to get it to stop?</p>