title: Finding the difference between a negative and positive binary Number
body: <p>I know that we can represent binary Numbers in several ways, but I am really not sure how to distinguish a positive binary number from a negative one.</p>
  
  <p>If we have the number <code>+13</code>, then its binary representation looks like this:
  <code>1101</code></p>
  
  <p>and its negative representation looks like this:</p>
  
  <p><code>11101</code></p>
  
  <p>What I understand is that if you need to distinguish them, then the presence of <code>0</code> is important in number <code>+13</code>:</p>
  
  <p><code>01101</code></p>
  
  <p>Even so, I still cannot distinguish between:</p>
  
  <p><code>11101 ///Here is the representation of -13</code></p>
  
  <p>and:</p>
  
  <p><code>11101 ///Here is the representation of +29</code></p>
  
  <p>I understand that here is used another scheme  called "two's complement" which I need to apply it.</p>
  
  <p>How can I distinguish those two binary representations?</p>