Variables

Variables are used to store temporary data. They are defined using the let keyword followed by the variable name, a type annotation, and an initial value. For example:

let x: int = 42;
let flag: bool = true;

In this example, a variable named x of type int is defined with an initial value of 42, and a variable named flag of type bool is defined with an initial value of true.

Read more about Types.

Variable Scope

Variables have a scope that determines where they can be accessed. If you define a variable inside a block of code, it can only be accessed within that block. For example:

if (true) {
    let x: int = 42;
}
// x is not accessible here
// and you can define `x` here without any conflicts
let x: bool = true;

Constants

Constants are used to store immutable data. They are defined using the const keyword followed by the constant name, a type annotation, and an initial value. For example:

const MAX_SCORE: int = 100;

In this example, a constant named MAX_SCORE of type int is defined with an initial value of 100.

Constants cannot be reassigned after their initial definition, ensuring that their values remain constant throughout the execution of the code.