# Section 8.12.1.11:
$VALUE_ITERS

sum!( other : NTP ) : SAME ; -- This iter feature yields the sum of all previous values of other. -- Note that other is re-evaluated on each re-entry of the iter. Dependent -- on the value provided, this iter may therefore produce a non-representable -- value which shall cause an exception to be raised. product!( other : NTP ) : SAME ; -- This iter feature yields the product of all previous values of -- other. Note that other is re-evaluated on each re-entry of the iter. -- Dependent on the value provided, this iter may therefore produce a -- non-representable value which shall cause an exception to be raised.

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