Variables

Variables are declared with let. They can be reassigned after declaration.

let <name>[: <type>] = <expression>;

fn main() {
    let a = 10;
    let b = a * 2;
    print(b); // 20
    return 0;
}

• No type annotation required — defaults to i64; use : Type to specify another type
• The right-hand side can be any expression, including function calls
• Variables are scoped to the function they are declared in

Reassignment

A variable declared with let can be reassigned:

x = <expression>;

Compound assignment operators are also available: +=, -=, *=, /=. See Expressions for details.