A character string is a contiguous sequence of bytes in memory, as shown below.
A character string is specified by two attributes: the address A of the first byte of the string, and the length L of the string in bytes. The length L of a string is in the range 1 through 2,147,483,647 (2**31-1) for IA-32 systems and in the range 1 through 9,223,372,036,854,775,807 for Intel® EM64T and Itanium®-based systems.