import  java.util.Scanner;
        public class nfactorialwhileloop
        {
            public static void main(String[] args)
            {
                int number;
                int factorial =1;
                int n = 1;

                Scanner scan = new Scanner(System.in);
                System.out.print("Enter the number: ");
                number = scan.nextInt();
                while(n<number)
                {
                    n++;
                    factorial*=n;

                }
                System.out.println("n! =" + factorial);




            }
}