Java Program To Check a number is prime or not.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

import java.util.Scanner; public class PrimeNumber{ public static void main(String[] args){ Scanner in = new Scanner(System.in); System.out.println("Enter a number greater than 2 which you want to check whether that number is prime or not: "); int p = in.nextInt(); int i=2; for(; i<10; i++){ if(p%i==0 && p!=i){ System.out.println("Entered number "+p+" is not a prime number."); break; } } if(i==10){ System.out.println("Entered number "+p+" is a prime number."); } } }

Output

1 2 3

Enter a number greater than 2 which you want to check whether that number is prime or not: 139 Entered number 139 is a prime number.