title: What is a pseudo-random integer?
body: <p>I am reading a C book.  In the description of the <code>rand()</code> function, they say: </p>
  
  <blockquote>
    <p><code>rand</code> returns a pseudo-random integer in the range <code>0</code> to <code>RAND_MAX</code>.  <code>RAND_MAX</code> is implementation dependent but at least <code>32767</code>. </p>
  </blockquote>
  
  <p>I don't understand; what is a "pseudo-random integer"?</p>
  
  <p>Thanks.</p>