for 迴圈

The for loop is closely related to the while let loop. It will automatically call into_iter() on the expression and then iterate over it:

fn main() {
    let v = vec![10, 20, 30];

    for x in v {
        println!("x: {x}");
    }
    
    for i in (0..10).step_by(2) {
        println!("i: {i}");
    }
}

您可以照常使用 break 和 continue。