Constants and Globals

Constants

Constants use const and must be initialized immediately:

const APP_NAME: String = "Zap Demo";
const MAX_RETRIES: Int = 5;

Local constants

fun main() Int {
    const LIMIT: Int = 10;
    return LIMIT;
}

Global variables

Mutable top-level state uses global var:

global var destroyed: Int = 0;

Aliases

Aliases let you name an existing type:

alias Score = Int;
alias Name = String;

Example

alias Score = Int;
global var total: Score = 0;

fun add(points: Score) {
    total = total + points;
}

fun main() Int {
    add(10);
    add(5);
    return total;
}