HEXADECIMALS

Presenting

HEXADECIMALS

By Grant Whiteman

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A few statistics

- E% use hexadecimal at work - 0x12% of you are even more confused

of people don't know how to use hexadecimal

What is hexadecimal

Hexadecimal Number System is one type of Number Representation technique Base 16 Letters are used to represent 10 - 15 10 11 12 13 14 15 A B C D E F

Example

Letters are used to represent 10 - 15 10 11 12 13 14 15 A B C D E F F9E F 9 E 15 9 14 162 161 160 (256) (16) (1) 3994

WHY is hexadecimal

-Used to simplify binary codes for humans -Computers use binary which can be easily represented in hex -1 byte is 8 bits -1 byte represented as 00 - FF 0000 0000 - 1111 1111 000 - 255

One byte in different bases:

Base-2 (Binary):

1 1 1 1

1 1 1 1

8 4 2 1

128 64 32 16

What the computer likes

One byte in different bases:

Base 10 (decimal):

2 5 5

2 x 102 5 x 101 5 x 100

What we like

One byte in different bases:

Base 16 (Hexadecimal):

F F

15 x 16

15 x 1

Compromise!!

Other bases we won't go into but are useful to know about

(don't worry you've not failed yet)

One byte in different bases:

Army-base:

One byte in different bases:

Buttery buscuit-base:

WHERE are hexadecimals?

WHERE are hexadecimals?

THE TEAM

Grant Whiteman

Digital FuturesChief Technical Narcissist

THANKS!

Any questions?