However, if you use Math.Round to perform the addition, JavaScript rounds the value to 3. This method, which works in all browsers, rounds numbers to the next integer if the result is 0.5 or greater.

How do you round a number? Discover how rounding numbers to the nearest ten or hundred can sometimes be helpful in this Bitesize Second Level Maths guide.

How to Break Rounding Ties When it comes to rounding numbers, the only real question is which way to round the number 5. In other words, how should we break a tie?