So today we are talking about hexadecimal. No it’s not the virus from the cartoon Reboot
I mean the lovely programing language that is several times used in coding.
If you check out lesson one (https://plus.google.com/u/0/110772295533413912899/posts/NqiuVu2Kjg7), and learned something from there you will know by now that decimal uses numbers to define itself. Numbers are limited to 10 possibilities ( 0 1 2 3 4 5 6 7 8 9). This is where hex becomes quite unique. There are 16 possibilities. How? well simple. It cheats and uses letters as well. Namely A to F. So the 16 possibilities (0 1 2 3 4 5 6 7 8 9 a b c d e f ) allow for 256 possibilities (16 x 16) using just 2 characters. Remember decimal ranges ? 0 to 255. Yeah they relate there . But we will leave these relations for more advanced lessons.
For now let’s limit ourselves to converting from hex to ASCII.
So let’s discuss ranges for letters and numbers
A- Z will be 41-5a
Please notice this the letters IJKLMNOP in hex are 49 4a 4b 4c 4d 4e 4f 50. The reason I am point out this is for you to see how the sequence in hex works.
So for the rest a-z (61-7a) and the numbers 0-9 (30 39)
4c 65 73 73 6f 6e 32
So if you look at this you should immediately recognize the encoding as hex not only because of the ranges but because of the letters e and f there. Hex codes major recognition is those letters (a-f). Keep that in mind.
To translate Hex to ASCII once again I recommend http://www.asciitohex.com
Ok enough with the chitchat and down to our exercise of the day.
It will be similar to the one from yesterday just with a little…twist
Have fun and enjoy your lvl 1 resonator :)
*NOTE* – The final result is web link not a passcode to put in ingress. The reward you get at the end is just for fun and to help you learn how to decode passcodes in the future ;)