# Hexadecimal

Remember, the decimal system is a base 10 number system – it uses symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

In contrast, the hexadecimal is a base 16 number system – it uses symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F. A – F represents the values 10 – 15.

In the decimal system,

meansIn the hexadecimal system,

meansAlso, in hexadecimal,

means Remember, representsAt first, Bob wasn't too happy about the hexadecimal notation. In particular, he heavily disliked the letters. Why not simply use numbers from

toBut yeah, there is a good reason for it, Bob realized. Just look at

If symbols like could be used in hexadecimal, what exactly is then? Is it Or is itBob decided perhaps there is no need to question every decision computer scientists ever made.

Or ... wait. Why not just use two places for each symbol? The symbols from

to can be simply padded with one zero. Like instead of would just stayYou could avoid letters this way! Except that this might not be as efficient as the traditional hexadecimal system. For example, we would have

instead of Nevertheless, Bob wouldn't be surprised to see computer scientists switch to his hexadecimal system entirely one day.