Parameter      Definition

    string         Enter characters enclosed in quotation marks. The
                   quotation marks can be either single (') or double
                   (").

                   The ASCII values of the characters in the string
                   are used as a list of byte values.

                   Within a string, the opposite set of quotation marks
                   can be used freely as characters. However, if the same
                   set of quotation marks (as the delimiters) must be used
                   within the string, then the quotation marks must be
                   doubled. The doubling does not appear in memory.

                   For example:

                   1.   'This "literal" is correct'
                   2.   'This ''literal'' is correct'
                   3.   'This 'literal' is not correct'
                   4.   'This "'literal'" is not correct'
                   5.   "This 'literal' is correct"
                   6.   "This "'literal'" is correct"
                   7.   "This 'literal' is correct'
                   8.   "This ''literal'' is not correct"

                   In the first, fifth, and seventh cases above, the word
                   literal is enclosed in one set of quotation marks in
                   memory. In the eighth case above, the word literal is
                   not correct unless you really want it enclosed in two
                   sets of quotation marks in memory.