title: What is the importance of 1's complement and 2's complement in Binary
body: <p>I'm trying to learn binary number system and almost very new. I just finished some chapter on binary number conversation,addition,subtraction etc with some basic thing's.</p>
  
  <p>But now I see a chapter on 1's complement and 2's complement. I know what is signed number,signed magnitude and how binary digit stored in memory in 8bits,16 bits etc. But the problem is I couldn't understand why 1's complement and 2's complement. Also why should we use 2's complement and why it's better etc.</p>
  
  <p>I'm following a book it's have the guideline to convert into 1's complement and 2's complement. But nothing explained why 1's complement and 2's complement.</p>
  
  <p>So I need some help to understand it more deeply. Any book suggestions for binary number system etc is appreciated.</p>
  
  <p>Thanks In Advance
  Robin</p>