Module:NumberFormater

Abbreviation	Name	Value	Equivalent
K	Thousand or Kilodillion	10^3
M	Million	10^6
B	Billion	10^9
T	Trillion	10^12
Qa	Quadrillion	10^15
Qi	Quintillion	10^18
Sx	Sextillion	10^21
Sp	Septillion	10^24
O	Octillion	10^27
No	Nonillion	10^30
D	Decillion	10^33
Udc	Undecillion	10^36
Dd	Duodecillion	10^39
Tdc	Tredecillion	10^42
Qt	Quattuordecillion	10^45
Qd	Quindecillion	10^48
Sd	Sexdecillion	10^51
St	Septendecillion	10^54
Od	Octodecillion	10^57
Nm	Novemdecillion	10^60
Vg	Vigintillion	10^63
Uvg	Unvigintillion	10^66
Dvg	Duovigintillion	10^69
Tvg	Tresvigintillion or Trevigintillion	10^72
Qav	Quattuorvigintillion	10^75
Qvg	Quinvigintillion	10^78
Svg	Sexvigintillion or Sesvigintillion	10^81
Spv	Septemvigintillion or Septenvigintillion	10^84
Ovg	Octovigintillion	10^87
Nvg	Novemvigintillion or Novenvigintillion	10^90
Tg	Trigintillion	10^93
Ut	Untrigintillion	10^96
Dt	Duotrigintillion	10^99
Reamining will follow e# notation.

* Sources from an external Github site.

---

local p = {}
local NumberParser = require('Module:NumberParser')
local Utility = require("Module:Utility")
local decimals = ''
local UNIT_EXPONENTS = {
    'K',
    'M',
    'B',
    'T',
    'Q',
    'QQ',
    'S',
    'SP',
    'O',
    'N',
    'D'
}
local function preprocess(numstr)
	-- Strip out anything from the decimal point onwards.
	decimals = numstr:find("%.(.*)") ~= nil and numstr:sub(numstr:find("%.(.*)"))  or ""
	numstr = numstr:gsub("%.(.*)", "")
	-- check if decimal is extrenious
	if decimals ~= nil and tonumber(decimals:sub(2)) == 0 then decimals = '' end
	-- If it is in e notation, ensure it parses as a string.
	if numstr:find("e") ~= nil then
		numstr = tostring(NumberParser.parse(numstr))
	end
	-- Return if Lots is the word, otherwise return bad number
	if tonumber(numstr) == nil then
		-- This could potentially break things if Lots is returned to another process.
		if numstr == "Lots" then
			return numstr 
		end
		return "<BAD NUMBER>"
	end
	return numstr
end

function p.main(frame)
	local numstr = preprocess(frame.args[1])
	if frame.args.formattype ~= "tooltip" then
		return p.formatnumber(numstr)
	else
		return p.formatnumberwithtootip(numstr)
	end
end

function p.formatnumber(arg)
	-- how many digts are after the first digit divided by 3.
	local unit = math.floor((arg:len() - 1) / 3)
	if unit == 0 or arg:len() <= 5 then
		return arg
	end
	
	local n = string.format("%.1f", tonumber(arg) / math.pow(10, unit*3)):gsub("%.0", "")
	
    return string.format("%s %s", n,  UNIT_EXPONENTS[unit])
end


function p.formatnumberwithtootip(arg)
	local arg1 = preprocess(arg)
	local arg2 = p.formatnumber(arg1)
	
	-- If formatnumber returned the same value then return that same value, otherwise format as tooltip.
	if arg1 ~= arg2 then
	    return string.format(Utility.tooltipstruct, p.formatwithseperator(arg1), arg2)
	end
	return p.formatwithseperator(arg1)
end

function p.formatwithseperator(arg)
	local ret = ''
	arg = preprocess(arg)
	-- Iterate from the end and add in commas.
	while arg:len() > 3 do
		ret = "," .. arg:sub(-3) .. ret
		arg = arg:sub(1, -4)
	end
	-- Prepend remaining digits.
	ret = arg .. ret .. decimals
	-- clear decimals
	decimals = ''
	
	return ret
end

return p