The
following are the
reserved words. Within a program, some or all
of the letters of a reserved word may be in upper case, and one or more
characters in category
other_format may be
inserted within or at the end of the reserved word.
8 The reserved words appear in
lower
case boldface in this International Standard, except when used in
the
designator
of an attribute (see
4.1.4). Lower case boldface
is also used for a reserved word in a
string_literal
used as an
operator_symbol.
This is merely a convention — programs may be written in whatever
typeface is desired and available.