title: how to find the length of a list in python without using len()
body: <p>I want to write a function which will find out the length of a list based on user input. I don't want to use the in-built function <code>len()</code>.</p>
  <p>Function which i have written is working for strings but for lists it is failing.</p>
  <pre><code>#function for finding out the length
  def string_length(a):
      for i in a:
          j+=1
      return j
  
  #taking user input
  a = input(&quot;enter string :&quot;)
  length = string_length(a)
  print(&quot;length is &quot;, length)
  </code></pre>