Math.round(num) vs num.toFixed(0) and browser inconsistencies

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Edit: To answer your edit, use Math.round. You could also prototype the Number object to have it do your bidding if you prefer that syntax.

Number.prototype.round = function() {
  return Math.round(this);
}
var num = 3.5;
alert(num.round())

I’ve never used Number.toFixed() before (mostly because most JS libraries provide a toInt() method), but judging by your results I would say it would be more consistent to use the Math methods (round, floor, ceil) then toFixed if cross-browser consistency is what you are looking for.

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