One's complement and two's complement by Sangkirthana

One's complement

One's complement is operation to replace all the 0's to 1's and 1's to 0's.

    For example:                      

                                                (010010)₂

   The one’s complement =   (101101)₂

its simple as that..

Notes :

• For one's complement representation the left most bit is 0 for positive number and 1 for negative   number
• there also representation of both +0 and -0 which are 00000000 and 11111111 respectively.

Two's complement

Two's complement is form just like forming one's complement : complement all of the bit in number, then add 1,
For more understanding:
      Two’s complement = one’s complement + 1
                 

For example:                      

                                                (01101)₂

The two’s complement =       10010

                                                +        1

                                                  10011

Notes:

• For two's complement representation the left most bit is also 0 for positive and 1 for negative number, however this format does not have unfortune characteristic of signed magnitude and one's complement.