title: C# - Closest number to 0
body: <p>I apologize if it sounds dumb, I am a beginner in programming. 
  Can somebody explain how can I get the closest number to 0 if for example: </p>
  
  <p>A = -13</p>
  
  <p>B = 5</p>
  
  <p>How can I do this so it can display that in this example B is closest to 0? </p>
  
  <p>I tried some thing with "if" but can't seem to get it work.</p>
  
  <p>Thanks</p>