Hexadecimal
(original named Sexadecimal)


The base 16 notational system for representing real numbers.
The digits used to represent numbers using hexadecimal notation are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.
The following table gives the hexadecimal equivalents for decimal numbers from 0 to 15

Hex
Bin
Dec
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
A
1010
10
B
1011
11
C
1100
12
D
1101
13
E
1110
14
F
1111
15

The hexadecimal system is particularly important in computer programming, since four bits (each consisting of a one or zero)
can be succinctly expressed using a single hexadecimal digit.

Two hexadecimal digits represent numbers from 0 to 255, a common range used, for example, to specify colors.
Thus, in the HTML language of the web, colors are specified using three pairs of hexadecimal digits RRGGBB,
where is the amount of red, the amount of green, and the amount of blue.

 

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