You do a calculation, and the result is an integer $n.

Number $n. You haven't rounded to an integer yet.

$n   = 5.5;
$eps = -0.00000000000001;
printf "%.0f\n", $n;        # 6  expected
printf "%.0f\n", $n+$eps;   # 5  get
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If his calculations are suppose to always give integers before rounding, then yes, there's no problem.