class Main { public static void main(String[] args) { isPrimeNum(24); } public static void isPrimeNum(int num) { boolean flag = false ; int i = 2 ; while (i <= num-1 ) { if(num % i == 0){ System.out.println("It is not a prime no"); flag =true; break; } else { i++; } } if(flag == false) { System.out.println("It is a prime no"); } } }