用户在Java中需要的素数

Question

我想显示用户所需的素数.例如,如果用户想要第3个素数,我将显示5.我有以下java代码.

import java.util.Scanner;

public class Prime {

private static Scanner scanner;


public static void main(String args[]) {

 //get input till which prime number to be printed
 // System.out.println("Enter which prime number to be printed: ");
//  scanner = new Scanner(System.in);
//  int limit = scanner.nextInt();
  int count = 0;
  int number = 2;
  //System.out.println("Printing prime number from 1 to " + limit);
  while(count<=3)
  {
      if(isPrime(number)){
          count++;
         // System.out.println(count);
      }
      number++;
  }
  if(count == 3)
      System.out.println("10001 prime is "+number);

    }


public static boolean isPrime(int number){
    for(int i=2; i<number; i++){
       if(number%i == 0){
           return false; 
       }
    }
    return true; 
}
}

当我运行它时,我无法获得任何输出.我哪里错了？PS:暂时,我只运行循环直到3.

Answer 1

while(count <= 3)当你退出循环时,你已经这样做了count == 4.

因此,您if(count == 3)永远不会输入,也不会打印任何内容.