title: Magic function timeit
body: <p>I'm using the magic %%timeit function to get the time it takes to execute some code. The thing that bothers me is that when I run %%timeit, I don't get the results. For instace:</p>
  
  <pre><code>a=5
  b=3
  
  %%timeit
  c = a + b
  </code></pre>
  
  <p>Now if I want to use c in the next cell, I get that c hasn't been defined.</p>
  
  <pre><code>print(c)
  &gt;&gt;&gt;NameError: name 'c' is not defined
  </code></pre>
  
  <p>Could you help me understand why this happens, why doesn't c get stored when the  magic %%timeit function is used in that particular cell?</p>