Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Rs complement

  1. Sep 15, 2007 #1
    1. The problem statement, all variables and given/known data
    let me check my understanding of what a twos complement

    when you use the rs complement system that means you use that system to express negative numbers only; in order to express the rs complement of a number you take r^n - that number; however if the number you want to express is positive then you do not really use the twos complement system, so it is somewhat of a misnomer.

    I mean that even if we are working in the two's complement system and we want to express 5 we do not take r^n - 5,we just write 5

    does all that make sense

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Sep 15, 2007 #2
    r's complement

    r's complement is a way to express negation in a given radix r, when the number of available digits is limited to n-1.

    So, by obtaining r's complement, you're really obtaining a negative number.

    So, obviously, it doesn't apply to positive numbers unless you want to turn them negative :)

    A complement, in given radix, always behaves as a negative number as long as the number of digits you're considering is less than n.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook