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Hello everybody, can anybody tell me how to think (and count) in Octal? I mean...what if I get a question which asks me to tell the diff. b/w a decimal no. and an octal one I just realized that I'll be stumped! -Deb

Hi, It's simple.. Decimal 0 1 2 3 4 5 6 7 8 9 then 10 Octal 0 1 2 3 4 5 6 7 8 then 10 how to convert Dec 113 to Oct? 113 div 8 = 14 with remainder 1 14 div 8 = 1 with remainder 6 1 div 8 = 0 with remainder 1 divide until you get 0 ... then look at the remainders ... read them up from bottom.. so Decimal 113 = Octal 161 How do you convert Octal 161 to Dec 113? gotta memorise one thing : right most digit means 8 to the power of 0 2nd to right most digit means 8 to the power of 1 3rd to right most digit means 8 to the power of 2 so on... take 161 .. multiply right most 1 by 8 to the power of 0 which is 1 . multiply 6 by 8 to the power of 1 which is 48. multiply left most 1 by 8 to the power of 2 wichi is 64 . add those three results which is 113 .. back to our octal number. I don't know if I make any sense.. but this is kinna hard to explain over a message post. Hope this helps

Here is a quick way to convert binary to octal, just put it into groups of three digits and convert each. Example: 54321 decimal = 1101010000110001 binary split into groups (and pad with leading zeroes) 001 101 010 000 110 001 = 152061 octal of course it is just as easy to go the other way 12345 octal = 001 010 011 100 101 binary

[This message has been edited by Graeme Brown (edited October 25, 2000).]

DD
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Sean, thanks a million the concept is now crystal clear thanks to u... actually I used to do the same before I got hold of a scientific calculator during my engineering days!!! Guess that is an example of too much technology to do simple things... anyhow....thanks again -Deb

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Thanks Graeme, that was a pretty helpful way too -Deb