Number of bits in a byte

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In C++, a byte is the space occupied by a char object. The number of bits in a byte is given by CHAR_BIT, which is defined in climits and required to be at least 8. While most modern systems have 8-bit bytes, and POSIX requires CHAR_BIT to be exactly 8, there are some systems where CHAR_BIT is greater than 8 i.e a single byte may be comprised of 8, 16, 32 or 64 bits.

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