java中两个数字之间的范围错误[duplicate]

Question

我运行这个代码

import java.util.Scanner;
import java.util.ArrayList;

public class Main {
    private static final Scanner scanner = new Scanner(System.in);
    
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int N = scanner.nextInt();
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
        if(N % 2 == 1){
            System.out.println("Weird");
        }
        if((N % 2 == 0) && (2 <= N <= 5)){
            System.out.println("Not Weird");
        }
        if((N % 2 == 0) && (6 <= N <= 20)){
            System.out.println("Weird");
        }
        if((N % 2 == 0) && (N > 20)){
            System.out.println("Not Weird");
        }
        scanner.close();
    }
}

但结果是

The operator <= is undefined for the argument type(s) boolean, int 

我想知道为什么会发生这种错误。

Answer 1

如果要计算表达式（X

if((number % 2 == 0) && (2 <= number) && (number<= 5)){
        System.out.println("Not Weird");
}


if((number % 2 == 0) && (6 <= number) && (number <= 20)){
        System.out.println("Weird");
}


if((number % 2 == 0) && (number > 20)){
        System.out.println("Not Weird");
}