title: Formatting Long and Double in Scala println
body: <p>What's the suffix after '%' I should use in order to format a Long or a Double type variables? </p>
  
  <pre><code>var LONG : Long = 9L;
  println("The value of LONG is %?".format(LONG));
  var DOUBLE : Double = 9.9;
  println("The value of DOUBLE is %?".format(DOUBLE));
  </code></pre>
  
  <p>Many thanks.</p>