How to use while loop to find the factorial of n in java

Implementation ideas:

1. Define two variables to store the number representing the factorial and the factorial result respectively;

2. Use while Calculate the factorial in a loop;

3. Just print the factorial result.

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The specific code is as follows:

package hello;

import java.util.Scanner;

public class Hello {

 public static void main(String[] args) {
  Scanner in = new Scanner(System.in);
  int n;
  n=in.nextInt();
  int i=1,sum=1;
  while(i<=n)
  {
   sum=sum*i;
   i++;
  }
  System.out.print(sum);
 }

}

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