小红的正整数计数

实现代码：

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int l = scanner.nextInt();
        int r = scanner.nextInt();

        int n = 0;
        for(int i = l ; i <= r; i ++){
            if(i % 2 == 0){
                n ++;
            }
        }
        System.out.println(n);
        scanner.close();

    }