Module:Number

Formats numbers with thousand separators. Non-numeric input is returned unchanged, so the module is safe to use on mixed content (e.g., empty text, labels passed through in error).

Examples

Code	Result
{{#invoke:Number|main|value=1500}}	1,500
{{#invoke:Number|main|value=1500.50}}	1,500.50
{{#invoke:Number|main|value=-1500}}	−1,500
{{#invoke:Number|main|value=abc}}	abc

The value parameter is required (named). Leading and trailing whitespace is trimmed.

Notes

• Trailing zeros in the decimal portion are preserved: 1500.50 formats as 1,500.50, not 1,500.5.
• Input like 1500. (trailing dot, no digits) is treated as invalid and returned unchanged.

---

-- Number formatting helpers for templates and other modules.
-- See Module:Number/doc for usage and behavior notes.

local Number = {}

--- Trim whitespace and convert nil to an empty string.
local function normalizeInput(value)
    if value == nil then return "" end
    return mw.text.trim(tostring(value))
end

--- Format a number with the wiki's locale-correct grouping separator.
--- Trailing zeros, leading zeros, and full input precision are preserved.
--- Non-numeric input is returned unchanged.
function Number.format(value)
    local str = normalizeInput(value)
    if not tonumber(str) then return str end
    local frame = mw.getCurrentFrame()
    return frame:callParserFunction('formatnum', str)
end

--- Entry point: {{#invoke:Number|main|value=1500}}
function Number.main(frame)
    return Number.format(frame.args.value)
end

return Number