title: How to create randomly generated strings in JavaScript that keep generating
body: <pre><code>var len = 20,
      str = '';
  
  while( len-- ) {
      str += String.fromCharCode( 48 + ~~(Math.random() * 42) );
  }
  
  console.log( str );
  </code></pre>
  
  <p>How would I change this code so that I can generate any amount of these strings that I want?</p>