title: Range function is not working properly in jupyter notebook
body: <pre class="lang-py prettyprint-override"><code>for i in range():
      for j in range(i):
          print(&quot;*&quot;,end = &quot; &quot;)
      print()  
  </code></pre>
  <p>Error:</p>
  <pre class="lang-none prettyprint-override"><code>TypeError
  Traceback (most recent call last) &lt;ipython-input-81-6bc40b03c32e&gt; in &lt;module&gt;
  ----&gt; 1 for i in range():
        2     for j in range(i):
        3         print(&quot;*&quot;,end = &quot; &quot;)
        4     print()
        5 
  
  TypeError: 'int' object is not callable
  </code></pre>