Underneath the Syntax
References and supporting material.
Technical references connected to the book and its executable companion.
QF Code 1.1 language specification
The companion examples use QF Code. Its formal specification documents the language syntax, values, control flow, built-in functions, execution safeguards, and known implementation notes.
Reference browser implementation
The QF Code browser IDE is the implementation used by the companion. It runs locally in a modern browser and does not require an account.
Additional references
Edition-specific notes and supporting reading will be added here when they are useful to readers of the book.