Functions
Define functions, recursion, and reusable abstractions.
Functions are first-class values.
fn add(a: Int, b: Int) -> Int {
a + b
}Recursion
fn fib(n: Int) -> Int {
if n <= 1 { n }
else { fib(n-1) + fib(n-2) }
}Higher-order style
As the stdlib grows, higher-order helpers become the primary way to express loops and transforms.