title: Sum of even integers from a to b in Python
body: <p>This is my code:</p>
  
  <pre><code>def sum_even(a, b):
      count = 0
      for i in range(a, b, 1):
          if(i % 2 == 0):
              count += [i]
          return count
  </code></pre>
  
  <p>An example I put was print(sum_even(3,7)) and the output is 0. I cannot figure out what is wrong.</p>