title: How can I make a recursive function that returns a list of sum of the same index given two lists.?
body: <p>How can I make a recursive function that returns a list of sum of the same index given two lists.?</p>
  <p>I want to make it a recursive function only.</p>
  <p>for example:</p>
  <pre><code>list1 = [1,2,3]
  list2 = [2,4,6]
  </code></pre>
  <p>a recursive function will return a new list [3,6,9]</p>
  <p>The language should also be python.</p>
  <p>Thank you. I just having a hard time figuring it out.</p>