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Documentation for this module may be created at Module:Number/doc

```--
-- Number manipulation methods
--
-- Many methods are already available in the math library, so this will be fairly small
--

local p = {}

--
-- Rounds a number to a specified number of decimal places
--
-- If dp is not specified, it defaults to zero
-- based on <http://dev.wikia.com/wiki/Module:HF>
--
function p._round( num, dp )
if not num then
return
end
local mult = 10 ^ ( dp or 0 )
return math.floor( num * mult + 0.5 ) / mult
end

function p.round( frame )
return p._round( frame.args[1], frame.args[2] )
end

--
-- Expands a shorthand number to an actual number
--
-- @example 3.5k -> 3500
-- @example 10m -> 10000000
--
-- Returns the string if it is not a valid number
--

function p._short( str )
local num = str:sub( 1, -2 )
local char = str:sub( -1 )
if tonumber( num ) then
if char == 'k' then
num = num * 10^3
elseif char == 'm' then
num = num * 10^6
elseif char == 'b' then
-- strip trailing letter
num = num * 10^9
else
return str
end
return num
else
return str
end
end

function p.short( frame )
return p._short( frame.args[1] )
end

return p
```
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