title: iterating with python while loops
body: <p>Write a while loop that sums the values 1 through end, inclusive. end is a variable that we define for you. So, for example, if we define end to be 6, your code should print out the result:</p>
  
  <p>21
  which is 1 + 2 + 3 + 4 + 5 + 6.</p>
  
  <p>Is anybody able to guide me through this, without spoiling it for me?</p>