How about to simplify the factorial function name?

[stevengj]

@cormullion

const ❢ = Factorial()

Or const ❗ = Factorial(), which can be typed by \:exclamation:<tab>.

Honestly, though, I’m a bit curious about what kind of code makes such heavy use of factorial that a shortcut is worth it.

(A common mistake is calling factorial when evaluating series formulas. See also this tutorial.)