Section 8,4,2: Character

 A character constant is a string of printable ASCII characters
 enclosed by delimiters.  It takes one of the following forms:

   'c1,c2,c3...cn'       
   "c1,c2,c3...cn"

    where c is a printable character

 The length of the character constant is the number of characters
 between the delimiters.  In the apostrophe format, two consecutive
 apostrophes represent a single apostrophe.  In the quotation mark
 format, two consecutive quotation marks represent a single
 quotation mark.

 The length of a character constant must be in the range 1 to 2000.