Computer Science - Computer Fundamentals - Discussion

10101000111 This 1's and 0's binary language which can understand by computer.

It's hard to do operations on this binary numbers. To simplify this we use 1's and 2's compliment. Like if we have to subtract to binary number just find the 1's complement of number and add them together instead of subtracting.(adding binary number is simpler than subtracting).

1's compliment of 111000110010 is = 000111001101("0 converted to 1" and "1 converted to 0");

2's compliment of 111000110010 is = 000111001101 + 1 = 000111001110...

Complement = change (1 into 0) and (0 into 1).

Ex: 11111 = 00000 and 10101 = 01010.

1's complement is a regular complement, the above explanation.

2's complement is where you will change the last digit into '1' in your complement.

Ex: 11111 = 00001 and 10101 = 01011.

2's complement= 1's complement + 1.
2's complement of 1101 ?
0010- 1's complement
then add 1 to it
0010
1
----
0011.

To get 2s compliment you need to add 1 at the end of your 1s compliment e.g 10110 will change to 10111.

Why do we need 1's complement and 2's complement? I mean, what are they actually useful for?

Here, they haven't given any f-number how could we find the f answer? please explain to me.

1's complement of 0100 is 1011.

2's complement = 1's complement + 1.

1011.
+ 1.
= 1100.

Complement means reverse of the given number also 1 become zero and zero become 1.

I don't understand these complements can you explain in detail?

I don't understand about 2's complement. Can anyone explain it?