CertiGuide to A+ (Core Hardware) - Hexadecimal (Base 16)

Although binary is the way computers communicate on an electronic level, dealing with long strings of ones and zeros is too difficult a task for most human beings. However because of the large numbers that are dealt with in computers, this makes Base10 math unpractical as well. A new form of represent numbers was created based on using 0-9 then, A-F.

The first rule to know about hexadecimal math is that a Base16 digit represents four binary bits.

This makes easy for programmers to represent a byte with two hexadecimal digits. Refer to the chart below to see how Base16 digits are represented in Base10, and Base2.

**Table 5: Decimal, Binary and Hexadecimal Equivalents**
Base 10 (Decimal)	Base 2 (Binary	Base 16 (Hexadecimal)
0	0000	0
1	0001	1
2	0010	2
3	0011	3
4	0100	4
5	0101	5
6	0110	6
7	0111	7
8	1000	8
9	1001	9
10	1010	A
11	1011	B
12	1100	C
13	1101	D
14	1110	E
15	1111	F

Bit - Byte

VII Chapter 0000: Summary

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