Nice going, Ole! Now, how about an easy way to convert decimal to hex without going through binary (the way I learned)? :)
Persio ----- Original Message ----- From: "Ole Drews Jensen" To: Sent: Thursday, March 14, 2002 12:07 PM Subject: RE: Hex to Decimal for the RD [7:38223] > Hex is based on 16, where Dec is based on 10. > > When you see a value, no matter if it's in dec, hex, bin, or something else, > think of each number as being number 0 (the right one), 1, 2, 3, and so on. > > If you for instance have the decimal value 579: > > Number 0 would be 9 > Number 1 would be 7 > Number 2 would be 5 > > When you have decimal, the system is based on 10, so you will have to use 10 > to calculate your way to a result. > > The number 579 can be calculated this way: > > 9 * 10^0 = 9 > + > 7 * 10^1 = 70 > + > 5 * 10^2 = 500 > = > Result = 579 > > This seems pretty silly to calculate a value like that, but that's because > we're used to see the value in a 10-based format. > > Okay, let's take your first 16-based (hex) value - F00. > > Again, from right to left: > > Number 0 is 0 > Number 1 is 0 > Number 2 is F (15 in decimal) > > Instead of using the number 10 to calculate, you will need to use the number > 16 to calculate: > > The value F00 in hex can be calculated this way: > > 0 * 16^0 = 0 > + > 0 * 16^1 = 0 > + > F * 16^2 = 3840 > = > Result = 3840 > > You can with hex make words if that helps you remember the value, as long as > you do not use letters above F. > > For instance, the value ABBA would be a good one to use for a Swedish > Ericsson Server (if they exist), and the value would be calculated like > this: > > A * 16^0 = 10 > + > B * 16^1 = 176 > + > B * 16^2 = 2816 > + > A * 16^3 = 40960 > = > Result = 43962 > > If this is still a little confusing, the let's continue with your second > value, and break it up a little more: > > 2F2 > > First number is 2 (2 decimal) which must be multiplied by 16^0 (1). > > The result is 2. > > Second number is F (15 decimal) which must be multiplied by 16^1 (16). > > The result is 240. > > The third number is 2 (2 decimal) which must be multiplied by 16^2 (256). > > The result is 512. > > The final result will therefore give us 2+240+512 = 754 decimal. > > Conversions between all systems other than decimal is much easier, because > they are based on what I call double up. If you start with binary. Binary is > based on 2. When you double up, you will get 4. Next time you will get 8. 8 > is the number that Octal is based on, but that's not used much anymore. Next > time you will get 16. 16 is the number that Hex is based on. > > Now, you can see that going from hex to binary will be easier. Hex numbers > goes from 0 to 15, and binary goes from 0 to 1. So that means that four > binary numbers matches one hex number. > > An example: > > The hex number F00 again. If you take each number and convert it to binary, > it is much easier. > > 0 = 0000 > 0 = 0000 > F = 1111 > > Result = 1111 0000 0000 > > You can now convert the binary number to octal, which is based on three > binary numbers instead of four. > > First, put spaces in between every third to make it easier: > > 111 100 000 000 > > You can see that it is the same binary number as above, but it looks > different now. > > Now convert to Octal: > > 000 = 0 > 000 = 0 > 100 = 4 > 111 = 7 > > Octal result = 7400 > > Some people prefer to use binary when converting from hex to decimal. > > Again, let's take the F00. > > >From Hex to Bin: > > F 0 0 = 1111 0000 0000 > > Let's split the binary numbers up: > > 0 * 2^0 (1) = 0 > 0 * 2^1 (2) = 0 > 0 * 2^2 (4) = 0 > 0 * 2^3 (8) = 0 > 0 * 2^4 (16) = 0 > 0 * 2^5 (32) = 0 > 0 * 2^6 (64) = 0 > 0 * 2^7 (128) = 0 > 1 * 2^8 (256) = 256 > 1 * 2^9 (512) = 512 > 1 * 2^10 (1024) = 1024 > 1 * 2^11 (2048) = 2048 > > RESULT = 3840 > > > If you look at the first calculation we did in the beginning, you can see > that I came to the same result. > > Hth, > > Ole > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Ole Drews Jensen > Systems Network Manager > CCNP, MCSE, MCP+I > RWR Enterprises, Inc. > [EMAIL PROTECTED] > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > http://www.RouterChief.com > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > NEED A JOB ??? > http://www.oledrews.com/job > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > > -----Original Message----- > From: Mckenzie Bill [mailto:[EMAIL PROTECTED]] > Sent: Thursday, March 14, 2002 8:02 AM > To: [EMAIL PROTECTED] > Subject: Hex to Decimal for the RD [7:38223] > > > Could someone help me get a clear understanding of converting the hex number > to a nice decimal ring number or bridge number. > > Two examples that have me stumped are: > > F00 and 2f2. > > Thanks Everyone in advance. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38247&t=38223 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
