输入两个正整数分别表示Lower和upper

public static void main(String[] args){
        int lower,upper;
        Scanner scanner = new Scanner(System.in);
        lower = scanner.nextInt();
        upper = scanner.nextInt();
        if(lower <= 0 || upper <= 0 || upper > 100 || lower > upper){
            System.out.println("Invalid");
        }
        else{
            System.out.println("fahr celsius");
            for(int i=lower;i<=upper;i+=2){
                System.out.printf("%d %6.1f\n", i, 5.0*(i-32)/9);
            }
        }
    }