title: Sum up all the integers in range()
body: <p>I need to write a program that sums up all the integers which can be divided by 3 in the range of 100 to 2000. I'm not even sure where to start, so far I've got this tiny piece of code written which isn't correct.</p>
  
  <pre><code>for x in range(100, 2001, 3):
        print(x+x)
  </code></pre>
  
  <p>Any help is much appreciated!</p>