Functions and control flow

Functions use fn, a name, parameters, and a body. A final expression can be returned from a block.

fn classify(value: Int) -> Str {
    if value < 0 {
        "negative"
    } elif value == 0 {
        "zero"
    } else {
        "positive"
    }
}

Kirn includes if, elif, and else, plus while and for loops. Ranges use .. and ..= forms.

for number in 1..=5 {
    print(number);
}

Closures can capture values from the surrounding scope. See the verified examples in examples/06_functions_params.kn and examples/07_closures_captures.kn.