Elisp Fundamentals

S-expressions as code and data (homoiconicity). Prefix notation for all operations.

Data Types

• symbol: 'foo, :keyword
• cons cell: (cons 1 2) => (1 . 2)
• list: '(1 2 3)
• vector: [1 2 3]
• hash-table: (make-hash-table)
• string: "hello"
• number: 42, 3.14

Core Patterns