Luma documentation
Language Basics
Functions

Functions

Functions in Luma use the fn keyword, support type annotations on parameters and return values, and can be written as single expressions or full blocks.

Defining Functions
Block-style functions with fn and single-expression shortcuts with =>
 Parameters & Return Types
Type annotations, optional parameters, and return values
 Expression Bodies
Concise one-line functions for simple operations
 Recursion
Functions that call themselves for iterative problems
 Closures & Anonymous Functions
Lambdas, variable capture, and higher-order patterns
Last updated on