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LESSON 5.7

Two Names, One List

A List is a reference. Assigning it to another variable gives the same list a second name; it does not make a copy.

Goal Predict what the program prints.

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

Predict the program output [1, 2] [1, 2, 3] [1, 2, 3] [1, 2, 3] [1, 2] [1, 2]

Your code

main.zirk

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Zirk

import { stdout } from std.io;

fn main(): Void {
    mut a: List<Int32> = List(1, 2);
    mut b = a;
    b.add(3);
    stdout.println(a, b);
}

import { stdout } from std.io;

fn main(): Void {
    mut a: List<Int32> = List(1, 2);
    mut b = a;
    b.add(3);
    stdout.println(a, b);
}

⌘ / Ctrl + Enter

Your program output will appear here.

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