title: Reverse a number in javascript
body: <p>I want to reverse a number t following the tutorial.First I have passed a number as a parameter. I have converted the number to string with to String function. Then I used split("").reverse().join("") to reverse the number.
  My code is as follows:</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
  
  
          function reverse_the_string(num) {
              num = String(num);
              // str = num.toString;
              num.split("").reverse().join("");
              return;
          }
          console.log(reverse_the_string(56789));
      &lt;/script&gt;
  </code></pre>
  
  <p>However I get an error undefined? Can anyone explain what is the wrong?</p>