🐐 First order functions

README.md

@@ -244,6 +244,28 @@ Calling a function is done with the `INVOCA` keyword.
 > CXXI
 ```
 
+## First-class functions
+Functions are first-class values in CENTVRION. They can be assigned to variables, passed as arguments, returned from functions, and stored in arrays or dicts.
+
+Anonymous functions are created with the `FVNCTIO` keyword:
+
+![FVNCTIO](snippets/fvnctio.png)
+
+```
+> XIV
+```
+
+`INVOCA` accepts any expression as the callee, not just a name:
+
+![INVOCA expressions](snippets/invoca_expr.png)
+```
+> VI
+> VI
+> XVI
+```
+
+Note: CENTVRION does **not** have closures. When a function is called, it receives a copy of the *caller's* scope, not the scope where it was defined. Variables from a function's definition site are only available if they also exist in the caller's scope at call time.
+
 ## Built-ins
 ### DICE
 `DICE(value, ...)`