Strong number program in java

Java program to check given number is strong or not

import java.io.*;

class Test {

     public static void main(String[] args) throws IOException {

          int num,i,f,r,sum=0,temp;

          System.out.println("Enter a number");

          BufferedReader br=new BufferedReader(new InputStreamReader (System.in));

          num=Integer.parseInt(br.readLine());

          temp=num;

          while(num!=0){

              i=1;f=1;

              r=num%10;

              while(i<=r){

                   f=f*i;

                   i++;

              }

              sum=sum+f;

              num=num/10;

          }

          if(sum==temp)

              System.out.println(temp+" is a strong number");

          else

              System.out.println(temp+" is not a strong number");

     }

}

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