A literal is a character-string whose value is specified by:

    1)  the ordered set of characters it contains, or
    2)  a reserved word that is a figurative constant.

  Every literal belongs to one of two types: numeric or nonnumeric.

  Additional Information (explode) :

• figurative_constants
• hexadecimal_literals
• nonnumeric_literals
• numeric_literals
• floating_point_literals