Write a program to display al?l prime numbers between 1 to 1000.

♣♣♣ WRITE A PROGRAM TO DISPLAY ALL PRIME NUMBERS BETWEEN 1 TO 1000. ♣♣♣

import java.io.*;

class pro5

{

            public static void main(String args[]) throws IOException

            {

            int num,cnt,last,flg;

            InputStreamReader a=new InputStreamReader(System.in);

            BufferedReader b=new BufferedReader(a);

            System.out.print("Enter the last number of range: ");

            last=Integer.parseInt(b.readLine());

            System.out.print("List of all Prime Number upto "+last+" : \n");

                        for(num=1;num<=last;num++)

                        {

                        flg=1;

                                    for(cnt=2;cnt<=num/2;cnt++)

                                    {         

                                                if(num%cnt==0)

                                                {

                                                flg=0;

                                                break;

                                                }

                                    }

                        if(flg==1)

                        System.out.print(num+"   ");

                        }

            }

}

  

OUTPUT :-

            Enter the last number of range: 50

List of all Prime Number upto 50:

            1          2          3          5          7          11        13        17        19        23

           29         31        37       41       43          47