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Can you choose what decimal math.floor and math.ceil round to?

Asked by

ItsMeKlc 235

9 years ago

Is there a way to choose what decimal point math.floor/ceil round to? Like make it round to the 100th or 1000th instead?

A simple method, if you're comfortable with the math, is to simply say "math.ceil(num * 10) / 10" (for rounding to a single decimal point) chess123mate 5873 — 9y

1 answer

Answered by

adark 5487

9 years ago

No, but you can do some fancy math with powers of ten to get that behavior:

function ceilBase(num, decimals)
    if not decimals then decimals = 0 end
    local pow = 10^decimals
    num = num*pow
    num = math.ceil(num)
    num = num/pow
    return num
end

And the same for math.floor.

Can you choose what decimal math.floor and math.ceil round to?

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