如何获取内部循环值并赋值给外部变量

var sum = 0;
for (var i = 0; i < 10; i++) {
  sum += i;
}
console.log(sum); // 输出 45

def create_closure(i):
    def closure():
        return i
    return closure

values = []
for i in range(10):
    values.append(create_closure(i))

results = [f() for f in values]
print(results)  # 输出 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

import java.util.Iterator;

public class Generator implements Iterable<Integer> {
    private int start;
    private int end;

    public Generator(int start, int end) {
        this.start = start;
        this.end = end;
    }

    @Override
    public Iterator<Integer> iterator() {
        return new Iterator<Integer>() {
            private int current = start;

            @Override
            public boolean hasNext() {
                return current < end;
            }

            @Override
            public Integer next() {
                return current++;
            }
        };
    }
}

public class Main {
    public static void main(String[] args) {
        Generator generator = new Generator(0, 10);
        int sum = 0;
        for (int value : generator) {
            sum += value;
        }
        System.out.println(sum);  // 输出 45
    }
}