This. In the article, Carmack does suggest just this, although its not as explicitly called out.

If your methods are functional, then

    int fancyNumber = calculateFancyNumber();

Can be inclined cleanly/equivalently as:

    int fancyNumber;
    {
        // [Mathy stuff redacted]
        fancyNumber = someIntermediateVariable / anotherIntermediateVariable;
    }