Walter Roberson on 5 Oct 2012
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Consider -23/5 (that is, the case of negative numbers.) Should that be -4 times 5 and remainder -3, or should it be -5 times 5 and remainder 2 ?
If you want the -4 version so that abs() of the "integer part" of -23/5 and 23/5 are the same, then use fix()
If you want the -5 version so that the remainder is always non-negative, then use floor()
You can use either fix() or floor() if you only have positive values, with floor() being preferred (more efficient, mathematically clearer)
Do not use round() even if you have only positive values. round(23/5) is 5, not 4.
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