Set symbol to a value.
label SET expression
SET label expression
The SET directive is used to assign the value of the expression in the operand field to the label. The SET directive functions somewhat like the EQU directive. However, labels defined via the SET directive can have their values redefined in another part of the program (but only through the use of another SET directive). The SET directive is useful in establishing temporary or reusable counters within macros. The expression in the operand field of a SET directive must be absolute and cannot include a symbol that is not yet defined (no forward references are allowed).
COUNT SET 0