Eight consecutive bits form a byte. There are 256 (2⁸) byte variations. That is, a byte can be one of 256 eight-bit sequences. For example, 11010001 is one of these 256 possibilities. Programming languages that support character data types, such as C, C++, and Pascal, use a single byte to represent one character.

Hexadecimal notation is convenient for representing binary data because each hexadecimal digit represents four binary bits. The following table lists the hexadecimal values from 0 to F, along with the equivalent binary values:

Hex	Binary	Hex	Binary
0	0000	8	1000
1	0001	9	1001
2	0010	A	1010
3	0011	B	1011
4	0100	C	1100
5	0101	D	1101
6	0110	E	1110
7	0111	F	1111

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