strong number program in java

import java.util.Scanner;
  public static void main(String[] args);
class StrongNumber{
    
   int num;
   int i,p,r;
   int sum = 0;
   int total;
   Scanner sc = new Scanner(System.in);

   System.out.println("enter a number");
    num = sc.nextInt();
    total = num;
    while(num!=0)
    {
        i = 1;
        p = 1;
        r = num%10;
        while(i<=r)
        {
          p = p*i;
          i++;
        } //while
        sum = sum+p;
        num = num/10;

      } //while
    
    if(sum==total)
    {
      System.out.println("it is Strong number");
    }
    else
    {
      System.out.println("it is not Strong number");
    }
         }
     }