value assigned to `right` is never read

i am new to rust so i may be confused or ignorant but i couldn’t find an ansower for my situation or faild in my search at least
so this is my code

fn main() {
    let sorted_array: [i32; 10] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
    let target: i32 = 3;
    let mut left: usize = 0;
    let mut right: usize = 10;
    while left <= right {
        let middle: usize = (left + right) / 2;
        if sorted_array[middle] == target {
            println!("Target index {middle}");
            break;
        }
        if sorted_array[middle] > target {
            right = middle - 1;
            break;
        }
        if sorted_array[middle] < target {
            left = middle + 1;
            break;
        }
    }
}

so i get this error

warning: value assigned to `right` is never read
  --> src/main.rs:13:13
   |
13 |             right = middle - 1;
   |             ^^^^^
   |
   = help: maybe it is overwritten before being read?
   = note: `#[warn(unused_assignments)]` on by default

but i am using these variables at

let middle: usize = (left + right) / 2;

doesn’t it count as a read? if not what is counted as a read? and how can i wright this code correctly?

i am still tring to learn so i will be thankful for an answer

i tried to find the same mistake but all the question had a work around or the compiler had a right to complain
i expect any source that answer my question or a direct answer to my questions from the community
sorry for any english mistakes

>Solution :

I’m guessing you don’t want the break in the second and third if statement. The compiler is pointing out that you assign a value to right, then the loop is immediately exited, thus the value is never read again.