title: Python - Finding the difference between 2 numbers
body: <p>So I'm trying to find a way to find the difference between 3 ints;
  a, b, c
  so I need to find the difference between a - b and the difference between b - c
  and then print true if the difference is the same, else printing false.
  I've been attempting to use the abs() function but can't seem to get the result I need. any help would be appreciated. </p>
  
  <p>Here is the problem statement:</p>
  
  <p><em>Given three ints, a b c, one of them is small, one is medium and<br>
  one is large. Print True if the three values are evenly spaced, 
  so the difference between small and medium is the same as the 
  difference between medium and large.</em>                               </p>
  
  <p>this is what i have so far;</p>
  
  <pre><code>a = int(input())
  b = int(input())
  c = int(input())
  
  if abs(a-b) == abs(b-c) :
      print("True")
  else :
      print("False")
  </code></pre>
  
  <h1>#</h1>
  
  <pre><code>Test Input  Expected Actual 
  1     4 6 2    True  False
  2     6 2 4    True  False
  3   10 9 11    True  False
  </code></pre>