Scope

Where a variable is visible.

Block scope

Each { } block creates a new scope. Bindings declared inside a block are not visible outside it.

fn main() {
    let x = 1
    if true {
        let y = 2
        print(x)
        print(y)
    }
}

fn main() -> void {
    let x: i32 = 1
    if true {
        let y: i32 = 2
        print(x)
        print(y)
    }
}

Output

1
2