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return

The return keyword exits the current function and yields a value to the caller. A bare return; returns from a function with no value.

Syntax & Example​

fn square(x: i32): i32 {
    return x * x;
}

fn earlyExit(items: [i32]): i32 {
    for it in items {
        if it < 0 { return it; }
    }
    return 0;
}

Use Cases​

  • Producing a function's result.
  • Short-circuiting out of a loop or branch.
  • Returning early from guards and validation checks.
note

return also triggers any defer statements registered in the enclosing scope before control leaves the function.