How do you round decimals to the hundredths place?
I'm incorporating a KDR into my script, but I saw that when it gets to a funky ratio(something like 7/3) it can go to tons and tons of digits. So how would I round that to the .00th?
Here's an example of a line from my script
KDR.Text=player.TotalKills.Value/player.TotalFatal.Value
Thank you.
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1 answer
There isn't a super nice way to do this in Lua, unfortunately.
Here are two options. One based on processing the number as a number, the other by processing the number as a string.
Math
We can use modulus to find the thousandths+ part of the number, and remove that. If we want to round rather than truncate, we would add five thousandths to the number before doing this:
function truncate(x, places)
return x - x % 10^(-places)
end
function round(x, places)
return truncate(x + 10 ^ (-places) / 2, places)
end
Strings
We can turn the number into a string, then chop off the places too many after the decimal point. This can't (easily), only truncate.
x = tostring(1.99)
x = x:gsub("%.(%d%d)%d+",".%1");
-- a decimal point, followed by two digits, followed by at least on digit
-- becomes a decimal place followed by the first two digits
A cool property of the second one is that you can use it on full segments of text, not just the number itself.
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