• Bool: t or nil/() … (no literal false
• Char: ?c (c:
  • \N{U+…} \ooo
  • {( \^ | \C- | \M- | \S | \A) x , - } e.g. ?\C-c-\M-s
  • x \escaped \xXX \N{name} \uxxxx \Uxxxxxxxx

symbol

Sequence

https://www.gnu.org/software/emacs/manual/html_node/elisp/Sequences-Arrays-Vectors.html

length

nth N SEQ → nth element (starting from 0)

elt SEQ N

(list) → Linked List (with cons as Node type)

‘(e1 e2 …) / ‘(e1 . (e2 . ( … )))

<aside> ⚠️

DO NOT use ‘(e1, e2) otherwise it means e1, with e2 (the former is a symbol with , as its part)

</aside>

(cons CAR CDR) → CONStruction of linked list cell

car → head (Content AddRess)

cdr → tail (type is cons) (Content DecRement)

(vector) → Fixed-length Array

[e1 e2 …]