Twin Prime Numbers in Java

Twin Prime Numbers :

The difference between two prime numbers are 2 those Prime numbers called as Twin Prime Prime Numbers

package my.TwinPrime;

import java.util.Scanner;

public class TwinPrime {

public static int primechecker(int n) {

int f = 0;

for (int i = 2; i <= n / 2; i++) {

if (n % i == 0) {

f = 1;

break;

}

return f;

}

// main method begins execution of this class

public static void main(String args[]) {

int num1, num2;

Scanner sc = new Scanner(System.in);

System.out.print("Enter first number: ");

// Waiting for the user input

num1 = sc.nextInt();

System.out.print("Enter second number: ");

// Waiting for the user input

num2 = sc.nextInt();

// if both are prime and difference between them is 2

if (primechecker(num1) == 0 && primechecker(num2) == 0 && Math.abs(num2 - num1) == 2) {

System.out.println("The numbers are twin prime numbers");

} else {

System.out.println("The numbers are not twin prime numbers");

}

OUTPUT: