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<John>
In this particular case, I think checking the divisor is very cheap in
terms of execution time, and moderately cheap in terms of code
clutter. Unless the divide-by-zero condition will almost never occur
(and *should* never occur), I think I would go with the explicit test
for zero.
</John>

... from the performance perspective, error handling is the best for rare conditions (just doing nothing, if no error occurs!!!).

D*B

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