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Lost calculating factorial

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Reno:
import java.util.Scanner;
public class Factorial {
  
    public static void main(String[] args) {
       Scanner bob = new Scanner(System.in);
       System.out.println("Please enter your integer.");
        int factorial = bob.nextInt();
        int counter = factorial;
        while (counter == 0)
           factorial = factorial * (counter - 1);
           counter--;
       System.out.println(factorial);
    }}

This is in java. Could someone tell me why it doesn't work.

sam:
umm I dont know much about Java but the structure looks good, maybe someone else will be able to be more indepth....

Reno:
Took me about 3 more hours that night but, i finally figured it out.

sam:
out of interest what was wrong?

Reno:
import java.util.Scanner;
public class Factorial {
  
    public static void main(String[] args) {
       Scanner bob = new Scanner(System.in);
       System.out.println("Please enter your integer.");
        int factorial = bob.nextInt();
        int counter = factorial - 1;
        while (counter > 1)
           {
          factorial = factorial * counter;
          counter--;
               }
       System.out.println(factorial);
    }}

// (bob1>1) { factorial*=bob1; bob1--; }

Thats the answer

I was under the impression that the loop repeated only when the answer was wrong. I also had to subtract 1 from factorial before going into the loop or the answer would be 5*5*4*3*2*1 = 600 instead of 5*4*3*2*1.

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