Write a Java program that prints the first n prime numbers, where n is a positiv

Question

Write a Java program that prints the first n prime numbers, where n is a positive integer that is given as input (from the user). For example, if the user enters 8, the program prints out the first 8 primes as follows: The first 8 primes are: 2, 3, 5, 7, 11, 13, 17, 19. The program must print out the first n primes for every n given by the user. The program should terminate only when the user enters a number that is not positive (the sentinel value). As an example, the following is the output of a sample run of the program:

Explanation / Answer

/* Java Programme for Prime Number */

import java.util.Scanner;
public class Prime
{

public static void main(String []args)
{
int n,c,i;
System.out.println("Enter a positive integer ");
while(1==1)
{
i=2;
Scanner sc=new Scanner(System.in);
n=sc.nextInt();
if(n<0)
{
break;
}
else
{
                   if ( n >= 1 )
                   {
                           System.out.println("The First "+n+" prime numbers are : ");
                          
                   }

                   for ( int count = 1 ; count <= n ; )           //repeat loop for display n prime numbers
                   {
                           for ( c = 2 ; c <= i - 1 ; c++ ) //loop used for a number i is prime or not
                           {
                               if ( i%c == 0 )
                               break;
                           }
                   if ( c == i )                                   //display if prime
                   {
                           System.out.println(" "+i);
                           count++;
                   }
                   i++;
                   }
}
           System.out.println("Enter another positive integer ");
}

  
}
}

Output :

Enter another positive integer

8
The First 8 prime numbers are :
2
3
5
7
11
13
17
19
Enter another positive integer

-1

Ok.Bye..

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