CODEWITHSUNDEEP
bit
user7239323
user7239323

Reputation:

Signed and Unsigned bits

What is the difference between signed 8-bits 1's and 2's complements and unsigned 8-bits? Does it have to do with adding 1 after the number all the way to the left? I'm lost lol

Upvotes: 1

Views: 1689

Answers (2)

kalanchloe
kalanchloe

Reputation: 503

Both signed and unsigned 8-bit values are represented with 8 bits. 1's and 2's complements act the same on both:

1's complement of unsigned 01110100 = 10001011
  1's complement of signed 01110100 = 10001011
2's complement of unsigned 01110100 = 10001100
  2's complement of signed 01110100 = 10001100

The only difference is how the 10001011 is interpreted. For an unsigned value, 10001011 represents the positive number 139. However, for an signed value, 10001011 represents -117.

Upvotes: 1

AlexanderRD
AlexanderRD

Reputation: 2089

signed bits can take negative values unsigned bits can only take positive values

so they both store the same range of values however the numerical values they can store are as follows

unsigned 8 bit: 0 to 255

signed 8 bit: -128 to 127

Upvotes: 0

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