title: R: What are operators like %in% called and how can I learn about them?
body: <p>I know the basics like <code>==</code> and <code>!=</code>, or even the difference (vaguely) between <code>&amp;</code> and <code>&amp;&amp;</code>. But stuff like <code>%in%</code> and <code>%%</code> and some stuff used in the context of <code>sprintf()</code>, like <code>sprintf("%.2f", x)</code> stuff I have no idea about. </p>
  
  <p>Worst of all, they're hard to search for on the Internet because they're special characters and I don't know what they're called...</p>