JAVA：標識素數

Question

我編寫了一個代碼來標識素數。沒有語法錯誤，但是當它不是素數時，它會再次循環輸入正整數。它應該是「再次嘗試按1並退出按2」。

這裏是我下面的代碼：

import java.util.*; 
public class TRY 
{ 
static Scanner Scan = new Scanner(System.in); 
public static void main (String[] arg) 
{ 

    int n; 

    System.out.println("Identify the if it's a prime number"); 

    while (true){ 

      System.out.println(); 
      System.out.println("Enter a positive integer: "); 
      n = Scan.nextInt(); 

     if (n>0) 
      { 
        boolean isPrime = true; 
        for (int i = 2; i <= n/2;i++) 
        { 
        if (n % i == 0){ 
            isPrime = false; 
          } 
        } 
        if (isPrime){ 
          System.out.println("The integer you entered " + n + " is a PRIME NUMBER!"); 
        } 
        else 
        { 
          System.out.println("The integer you entered " + n + " is not a PRIME NUMBER!"); 
          continue; 
        } 
        System.out.println(); 
        System.out.println("To try again press 1 and to exit press 2"); 

        if (Scan.nextInt() == 1) 
        { 
          continue; 
        } 
        else 
        { 
          System.out.println("Thank you!"); 
          break; 
        } 


    } 
    } 
} 
} 

Answer 1

取出 continue; 線 System.out.println("The integer you entered " + n + " is not a PRIME NUMBER!");後。

continue;所做的是跳過循環的所有部分，並執行循環的下一次迭代。