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Hexadecimal Numbers and How they relate to bits

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When working with bits, it is kind of hard to express every number using just ones and zeros, which is known as binary notation. To get around this we use hexadecimal (base 16) numbers.

As you may or may not know, it takes four bits to cover all the numbers from zero to fifteen, which also happens to be the range of a single digit hexadecimal number. This group of four bits, or half a BYTE, is called a nibble. As there are two nibbles in a BYTE, we can use two hexadecimal digits to show the value of one BYTE.

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

So if we had one BYTE containing the letter 'r' (ASCII code 114) it would look like this:

0111 0010    binary
 7     2     hexadecimal
posted May 22, 2014 by Atul Mishra

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