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Re: Operating with binary numbers

• To: mathgroup at smc.vnet.net
• Subject: [mg59089] Re: Operating with binary numbers
• From: dh <dh at metrohm.ch>
• Date: Thu, 28 Jul 2005 02:27:46 -0400 (EDT)
• References: <dc77gl$k5p$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,
2^^... and BaseForm are only concerned with input and output. 
Internally, the number representation is always the same.
If you want get at the bits, you need:

IntegerDigits and FromDigits

if you are using reals:
RealDigits and FromDigits

sincerely, Daniel

Wishmaster wrote:
> Hello,
> 
> I found that you can represent binary numbers in Mathematica with this:
> 
>  binary = 2^^110110101010111010
> 223930
> 
> And BaseForm[binary, 10] returns the number in decimal form
>   223930
> 
> I'd like to know if is there some function to test if a given bit of the 
> binary number is on, and to do operations like "shifting" the binary number. 
> I looked at the help but can't find anything.
> 
> I use Mathematica 5.0 on Windows XP.
> 
> Thanks.