Decimal limits in Lua?

[Shillelagh]

I have made a simple lua script to display a few stats in my helicopter, yet with fuel, when i give it a number not in increments of 10, i get some odd number like 20.4588888888888, could i limit this to 2 digits after the decimal point, so i get a number more like 20.45.

Thanks in advance,
-Ashes2007

[SterlingHagoromo]

If I understand this well you want to round a number to some number of decimals. You can use regular math for that or use the lua string functions.

Full example:
https://lua.flaffipony.rocks/?id=sAojeg4T4

function round(x, decimals)
	-- This should be less naive about multiplication and division if you are 
	-- care about accuracy around edges like: numbers close to the higher
	-- values of a float or if you are rounding to large numbers of decimals.
    local n = 10^(decimals or 0)
    x = x * n
    if x >= 0 then x = math.floor(x + 0.5) else x = math.ceil(x - 0.5) end
    return x / n
end

function onTick() 
  f = 1.2412165
  -- Round using regular math....
  trimmed = round(f, 2)
  -- Round using string libraries...
  trimmed2 = tonumber(string.format(".2f", f))
end

[Keyojin]

I use this. gN(#) is my input value that i want to display round up.

GPSx = math.floor(gN(5) * 100)/100
GPSy = math.floor(gN(6) * 100)/100