Basic output question

Question

i am in an intro to java class and had to write a program that calculates 12 factorial. i wrote the program, and it works perfectly, but my professor says it has no output. please PLEASE explain to me why the output isnt System.out.println whatever. and please explain to me what the output would be, because she unfortunatley cant for some reason. here is my code:
//This program calculates 12 factorial
public class factorial {
public static void main (String [] args) {
int factanswer = 1, n = 13;
  while (n > 1) {
   factanswer = factanswer*(n-1);
   n = n-1;
   System.out.println ("The answer to 12 factorial is " +  factanswer);
}

Answer 1

I would say to ask your instructor what exactly it was he wanted to see, that he did not see.