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LESSON 4.5

A Function That Calls Itself

Recursion happens when a function calls itself. It needs a base case that tells it when to stop.

Goal Add a base case so the countdown prints 3 , 2 , 1 , and ¡Despegue! , then stops.

Write a Zirk program, then run it to see the world react.

Your code

main.zirk

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Zirk

import { stdout } from std.io;

fn countdown(n: Int32): Void {
    stdout.println(n);
    countdown(n - 1);
}

fn main(): Void {
    countdown(3);
}

⌘ / Ctrl + Enter

Your program output will appear here.

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