I have a done a program in Receptionist program using java programming language.
import java.util.; public class Main { public static void main(String[] args) { int n=9875; int k=4; int sum=0; while(n!=0){ int rem=n%10; sum=sum+rem; n=n/10; }sum=sumk; System.out.println(sum);
if(sum<=9)
{
System.out.println(sum);
}
else{
int temp=sum;
while(sum>9){
int sum1=0;
while(sum!=0){
int rem1=sum%10;
sum1=sum1+rem1;
sum=sum/10;
}sum=sum1;
}
System.out.println(sum);
}
}
}