╭─[fac.lisp] 1 │ (defun factorial (n) (if (zerop n) 1 ────┬──── ╰───────────────────────── this function ... ╭──────────────────────╯ 2 │ │ (* n (factorial (1- n))))) │ ▲ │ │ ╰─────────────────────────────────┴─── ... is defined by this ╰─ (and here is EOF) ──╯