Python Exercise +=
<pre><code>k = 0
for z in xrange(x,y,2):  
    k += 1
print (k == 3)
</code></pre>

<p>so I'm trying to find values for x &amp; y that fulfill this.  I'm getting x = 1 and y =2 because 1+2=3=k.  But the += part is throwing me up.  anyone able to solve this?</p>
