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How do you round a decimal value to the nearest whole number?

Asked by
User#11440 120
8 years ago

It's a pretty simple question that doesn't require much explanation but this problem I'm having is annoying. So how do you change a decimal number like 123.343 and round it to the nearest whole number? I'm not the best at math. Any help?

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Answered by
XAXA 1569 Moderation Voter
8 years ago

An elegant solution would be to add 0.5 and round it down.

function round(n)
    return math.floor(n + 0.5)
end

There are several ways of rounding negative numbers. See this page for some more info. This implementation rounds -1.5 to -1, not -2.

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Thanks for the help! User#11440 120 — 8y
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Answered by
Acheo 230 Moderation Voter
8 years ago 
print(math.floor(123.343))

math.floor(NUMBER HERE) allows the decimal to go to the nearest whole number.

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The nearest whole number to 0.9 is 1, not 0. XAXA 1569 — 8y

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