The hexadecimal system is commonly used by programmers to describe locations in memory because it can represent every byte (i.e., eight bits) as two consecutive hexadecimal digits instead of the eight digits that would be required by binary (i.e., base 2) numbers and the three digits that would be required with decimal numbers. ![]() ![]() Thus, for example, the decimal number 11 is represented by B in the hexadecimal system and decimal 14 is represented by E. The numbers 0 through 9 are the same in both systems however, the decimal numbers 10 through 15 are represented by the letters A through F. Hexadecimal (Hex) is used in the transfer encoding Base16, in which each byte of the plaintext is broken into two 4-bit values and represented by two hexadecimal digits.
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