Ctrl / ⌘ + drag to orbit · Ctrl / ⌘ + scroll to zoomDrag to orbit · Pinch to zoom

LESSON 6.5

A Result That Can Fail

Int32.parse(text) returns a Result : either Ok(value) or Error(reason) . Use match to decide what happens in each case instead of crashing.

Goal Print the code plus one when it is valid, and tarjeta dañada when it is not.

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

Your code

main.zirk

Zirk syntax highlighting active

Lesson scaffold is locked. Edit the learner region.

Zirk

import { stdout } from std.io;

fn main(): Void {
    stdout.println(Int32.parse(card()));
}

⌘ / Ctrl + Enter

Your program output will appear here.

Sound unavailable in this browser