in this problem we have to calculate sum of digit until it comes in single digit for example
if 9875 is input
first time sum of digit will be 9+8+7+5=29
29 have 2 digit so we will again count…
2+9=11
11 have also 2 digit
so 1+1=2 will be final answer …
here for input 123 my output is printing only once but for 9875 my output is printing 4 times___I want to print only once…plz help
package Hackerrank;
import java.util.Scanner;
public class Recursive_digit_sum {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc = new Scanner(System.in);
long num = sc.nextLong();
int sum=0;
superDigit(num,sum);
//System.out.println(ans);
}
public static void superDigit(long num,int sum) {
if(num==0 && sum>=10) {
num=sum;
sum=0;
superDigit(num, sum);
}
if(num==0 && sum<10) {
System.out.println(sum);
return;
}
sum=sum+(int)(num%10);
superDigit(num/10, sum);
}
}