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LESSON 5.11

What a Function Receives

A function receives simple values as copies, but it can receive a shared list. It can change that list, while a number passed to it stays unchanged.

Goal Predict what the program prints.

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

Predict the program output [1] 1 2 [1, 9] 1 2 [1, 9] 2 2

Your code

main.zirk

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Zirk

import { stdout } from std.io;

fn grow(items: List<Int32>): Void {
    items.add(9);
}

fn plus_one(n: Int32): Int32 {
    return n + 1;
}

fn main(): Void {
    mut list: List<Int32> = List(1);
    mut n = 1;
    grow(list);
    mut m = plus_one(n);
    stdout.println(list, n, m);
}

import { stdout } from std.io;

fn grow(items: List<Int32>): Void {
    items.add(9);
}

fn plus_one(n: Int32): Int32 {
    return n + 1;
}

fn main(): Void {
    mut list: List<Int32> = List(1);
    mut n = 1;
    grow(list);
    mut m = plus_one(n);
    stdout.println(list, n, m);
}

⌘ / Ctrl + Enter

Output

Your program output will appear here.

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