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 07-27-2005, 09:11 PM #1 (permalink) Ultra Techie   Join Date: Jun 2005 Posts: 718 bits and bytes ok, I been reading up a little on this topic on howstuffworks and I have a question. I understand that there are 8 bits in a byte. In the article (which you can see here )it said that "With 8 bits in a byte, you can represent 256 values ranging from 0 to 255." thats where I get lost.... __________________
 07-27-2005, 10:30 PM #2 (permalink) Junior Techie   Join Date: Jan 2005 Posts: 55 it use binary system 255(D) equals to 11111111(B)... range : 00000000~11111111 (0~255) __________________ __________________ Simple is best ----------------- Learning English ... ÏëÑ§ÖÐÎÄµÄ¼ÓÎÒmsn:alexanderxyh@hotma il.com£¬ºÇºÇ
 07-27-2005, 10:40 PM #3 (permalink) Ultra Techie   Join Date: Jun 2005 Posts: 718 yeah but what I don't get is why does it only go up to 255?
 07-27-2005, 10:45 PM #4 (permalink) Super Techie   Join Date: Feb 2004 Posts: 416 Those 8 bits are broken down like this, 1 2 4 8 16 32 64 128 So you use a 1 to represent that number, like 0 would be 00000000, 16 would be 00001000 and so forth. If you add them all together, the max number is 255.
 07-27-2005, 11:06 PM #5 (permalink) Ultra Techie   Join Date: Jun 2005 Posts: 718 ah I see, that makes alot more sense now. sorta.... learning a new number system is kind of confusing. I'll get it eventually. Man do I feel stupid. lol
 07-29-2005, 08:57 PM #6 (permalink) Junior Techie   Join Date: Apr 2005 Posts: 67 Chog is backwards though, it is: 128 64 32 16 8 4 2 1 Binary is based on the number 2, the digit that is furthest to the right is 2 ^ 0, or 1. To the left of that is 2 ^ 1, to the the left of that is 2 ^ 2 and so on.
 07-29-2005, 09:10 PM #7 (permalink) Ultra Techie   Join Date: Jul 2005 Posts: 530 Its easier just to say that, since we start at 0 and not 1, that a number represented by 8 bits can represent numbers up to 2^8th - 1. In general, any number with N bits can hold numbers as large as 2^N - 1. __________________ __________________ Desktop machine: 2 x Opteron 246, Asus K8N-DL, 2GB PC3200 ECC Reg., XFX GeForce 6600GT, 74gb WD Raptor, 2 x 19\" LCDs, Windows XP x64 Server machine: Intel P4 3.0GHz 2MB EM64T, ECS i865pe, 1GB PC3200, 36gb WD Raptor, Windows Server 2003 Laptop: Dell Inspiron 9100 (Intel P4 3.2GHz 1MB Prescott, i865pe, 512MB PC3200, Mobility Radeon 9700, DVD+R/DL Burner), Windows XP Linux: P3 450Mhz, 386MB ram, Slackware 10.1 (Running mySQL/Apache)

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