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NOP
usage: NOP
-does nothing (a NO-oPeration instruction)
-used to control the binding of ELSE clauses in
compound IF statements

EXAMPLE:

IF i = j THEN /* First or "outer" IF */
IF j = k then a = 0 /* Inner IF */
ELSE NOP /* "Binds" or controls the inner IF */
END /* Binds to outer IF */