[Factorio Modding] How to determine the actual produced amount of a recipe product

gistfile1.txt

-- This code determines the actual amount of a product that a recipe produces.
-- The variable 'product' is one of the tables you get from recipePrototype.products.
-- Handles normal, probabilistic and 'range'-recipes

local produced_amount = nil
if product.amount_max ~= nil and product.amount_min ~= nil then
    produced_amount = ((product.amount_max + product.amount_min) / 2) * product.probability
elseif product.probability ~= nil then
    produced_amount = product.amount * product.probability
else
    produced_amount = product.amount
end