title: what does the % % mean in java?
body: <p>Im a PHP-programmer and wonder what this line means.</p>
  
  <pre><code>System.out.printf("exp(%.3f) is %.3f%n", x, Math.exp(x))
  </code></pre>
  
  <p>what does %.3f, %.3f%n and the comma x means?</p>