Storing negative integers in memory

#1

Hello, I have a little doubt in 2’s complement. Suppose we want to store -5 in a variable(memory). As the datatype int consumes 4 bytes(32 bits) of memory hence 5 is written as:

00000000000000000000000000000101

Using 2’s complement we will write -5 as:

10100000000000000000000000000001

Is this right or is there something that I am missing or getting confused into ?

How to identify if the binary number given is a negative integer or a positive integer
#2

1111 1111 1111 1111 1111 1111 1111 1011

#3

Negate all bits and then add 1

#4

but how will it happen ??

#5

@yashsharma4304 …

#6

Ok so negating a bit means convert 1 to 0 and 0 to 1. Right?

#7

Yes @yashsharma4304
Correct

After neagating this
1111 1111 1111 1111 1111 1111 1111 1010

Now add 1
1111 1111 1111 1111 1111 1111 1111 1011

#8

Ok now I understand what the flipping of a bit means. Thank u for resolving my doubt.

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