title: How to sort a list and put it in absolute value
body: <p>I have this list that contains positive and negative elements but now I need to sort the list and put it in absolute value, for example:</p>
  
  <p>list[-2,-3,8,-5,1,7]===>list[1,2,3,5,7,8]
  Is it clear?
  The code:</p>
  
  <pre><code>a=5
  b=6
  c=-3
  d=-8
  
  lista = [a,b,c,d]
  lista.sort()
  lista.reverse()
  </code></pre>