Prime Numbers In Java Example

Chapter: Miscellaneous Last Updated: 18-07-2016 04:43:55 UTC

Program:

            /* ............... START ............... */
                
import java.util.Scanner;

public class JavaPrimeNumbers {
	public static void main(String args[]) {
		int n, status = 1, num = 3;

		Scanner in = new Scanner(System.in);
		System.out.println("Enter the number of prime numbers you want");
		n = in.nextInt();

		if (n >= 1) {
			System.out.println("First " + n + " prime numbers are :-");
			System.out.println(2);
		}

		for (int count = 2; count <= n;) {
			for (int j = 2; j <= Math.sqrt(num); j++) {
				if (num % j == 0) {
					status = 0;
					break;
				}
			}
			if (status != 0) {
				System.out.println(num);
				count++;
			}
			status = 1;
			num++;
		}
	}

}

                /* ............... END ............... */
        

Output

Enter the number of prime numbers you want
10
First 10 prime numbers are :-
2
3
5
7
11
13
17
19
23
29

Notes:

  • A prime number (or a prime) is a natural number greater than one that has no positive divisors other than one and itself.
  • For example 5 is prime, as only 1 and 5 can divide it.

Tags

Prime Numbers, Java

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