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Thread: Finding the binary of negative numbers

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    Default Finding the binary of negative numbers

    How do u find the binary of negative numbers? I already did it for positive numbers, and help?


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    Super Moderator Norm's Avatar
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    Default Re: Finding the binary of negative numbers

    Can you explain what you want the code to do?
    Are you trying to create a String of binary digits (0s and 1s) from a number like an int?

    --- Update ---

    From a PM: Concerning the negative binary numbers, i got the answer.
    Please mark this thread as SOLVED if you have the answer.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Finding the binary of negative numbers

    Quote Originally Posted by Java girl View Post
    How do u find the binary of negative numbers?
    First, at binary level, there is no "negative" or "positive". Binary is 0s and 1s. Stop.
    The knowledge of "negative" is given by a specific representation (on a word of N bits), that is mainly implicit on every microprocessor. The most and well known is the "Two's complement" representation.

    So if you have an int in Java, you have 32 bits. You can print these 32 0s/1s regardless the fact that the number is positive or negative.
    And if you mean to print e.g. -1100 to say -12 in binary, it's ok but this is your choice/notation and it's not the same as the raw bits in a two's complement representation.
    Last edited by andbin; March 22nd, 2014 at 11:58 AM.
    Andrea, www.andbin.net SCJP 5 (91%) SCWCD 5 (94%)

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