Print all sub arrays with 0 sum using rust

sub_arrays.rs

fn print_all_sub_arrays(arr: Vec<i128>) -> Vec<Vec<i128>> {
  let mut sub_arrays:Vec<Vec<i128>> = Vec::new();
  for i in 0..arr.len() {
    let mut sum = 0;
    for  j in i..arr.len() {
      sum += arr[j];

      if sum == 0 {
        sub_arrays.push(arr[i..=j].to_vec());
      }
    }
  }
  return sub_arrays;
}

fn main() {
  let arr = vec![4,2,-3,-1,0,4];
  let sub_arrays = print_all_sub_arrays(arr);
  println!("{:?}", sub_arrays);
}