The assignment of bit string to character may be entirely arbitrary, but it must be adhered to consistently. It may be that some convenient rule is used in assigning bit string to character. The number of bits varies computer wise used to represent a character.

Some computers are use 7-bit (therefore allow up to 128 possible characters), some computers are use 8-bits (up to 256 character), and some use 10-bits (up to 1024 possible characters). The number of bits necessary to represent a character in a particular computer is called the byte size and a group of bits that number is called a byte .

Array

In computer programming, a group of homogeneous elements of a specific data type is known as an array , one of the simplest data structures. Arrays hold a series of data elements, usually of the same size and data type. Individual elements are accessed by their position in the array. The position is given by an index, which is also called a subscript. The index usually uses a consecutive range of integers, (as opposed to an associative array) but the index can have any ordinal set of values.