hello sir, please give me answer

Here is your complete program:

File name :count.java
---------------------
import java.io.*;
class count
{
public static void main(String arg[]) throws IOException
{
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(isr);
int inp= Integer.parseInt(br.readLine());
int sum=0,counter=0;
System.out.println("Given number"+inp);

if(inp>9)
{
while(inp>0)
{
sum+= inp%10;
inp= inp/10;
}
System.out.println(sum);
while(sum>0)
{
counter+= sum%10;
sum= sum/10;
}
System.out.println(counter);
}

}
}

System is the main class for input from the system resources.So, we are using System.in variable. This is used as a parameter to the constructor for InputStreamReader class. InputStreamReader' object is used as a parameter to BufferedReader class.

One of the methods available for BufferedReader object is readline(String).This method is used to read single full line in a string format. We have to handle an integer only .So Integer.parseInt(br.readLine()) will convert the arguement string into integer.

I think you know how the next two while loops works.