Variables

Syntax

[let | const] name (:type) (?=value);

Variable definitions start with either the let or const keyword.

let

The value of the variable can be changed.

The value of the variable can be set only once.

whic is why this is also valid

const a: i32;
// since const restircts the value to be settable only once
// declaring a const variable without a value is valid.

const a = 0;
a = 5; // not allowed to set a value of a constant nore than once

Type annotations are optional as long as there is a value assigned during initalization.

let a = 0; // ok, a is i32 (infered)
let b: i32; // ok, b is also known
let c; // error, unknown type

It is possible to assign a value of a different type as long as it can be coerced into it.

const a: f32 = 0; // i32 can be coerced into f32

While a variable is not assigned a value, it cannot be used.

let a;
print(a); // error, a is uninitalized
a = 0;
print(a); // ok