title: Adding values of two lists and getting sum as zero
body: <p>I am trying to add values of two lists and appending the result in third list. But receiving null values as output. I am sharing my code .</p>
  <pre><code>New1
  New2
  New3 = []
  for i,j in range(len(New1), len(New2)):
      Sum = (New1[i] + New2[j])
      New3.append(Sum)
  print(New3)
  print(len(New3))
  </code></pre>
  <p>Result I received is<code>[] 0</code></p>
  <p>Please if anyone can provide help.</p>