title: What does the double percentage sign (%%) mean?
body: <p>What is the double percent (<code>%%</code>) used for in R?</p>
  
  <p>From using it, it looks as if it divides the number in front by the number in back of it as many times as it can and returns the left over value.  Is that correct?</p>
  
  <p>Out of curiosity, when would this be useful?</p>