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7A. const (CONST)
syntax: CONST <declarations>,...
Enables you to declare a constant. A declaration looks like:
constants must be uppercase, and will in the rest of the program be
treated as <value>. Example:
CONST MAX_LINES=100, ER_NOMEM=1, ER_NOFILE=2
You cannot declare constants in terms of others that are being
declared in the same CONST statement: put these in the next.
CONST, ENUM and SET declarations are always global, i.e. it is not
possible to declare constants local to a PROC. The best place for
constant declarations is at the top of your source, but EC also
allows you to put them between two PROCs, for example.