Question

Is two’s complement notation of a positive number is same as its binary representation?

Answer 1

Is two’s complement notation of a positive number the same number?

The good example is from wiki that the relationship to two’s complement is realized by noting that 256 = 255 + 1, and (255 − x) is the ones’ complement of x

0000 0111=7 two’s complement is 1111 1001= -7

the way it works is the msb(most significant bit) receives a negative value so in the case above

-7 = 1001= -8 + 0+ 0+ 1

Edit- A positive number written in two’s-complement notation is the same as the number written in unsigned notation (although the most significant bit must be zero). A negative number can be written in two’s complement notation by inverting all of the bits of its absolute value, then adding one to the result. Two’s-complement notation

The maximum number that can be represented with a k-bit two’s-complement notation is 2^(k-1)−1