function addDigits(n){return n===0?0:1+((n-1)%9);}
console.log(addDigits(38));

function addDigits(n:number):number{return n===0?0:1+((n-1)%9);}
console.log(addDigits(38));

package main

func addDigits(n int) int {
	if n == 0 {
		return 0
	}
	return 1 + (n-1)%9
}

func main() {}

fn add_digits(n: i32) -> i32 {
	if n == 0 { 0 } else { 1 + (n - 1) % 9 }
}
fn main() {}

function addDigitsIter(n){
 while(n>=10){
  let s=0;
  while(n){s+=n%10;n=Math.floor(n/10);}
  n=s;
 }
 return n;
}

function addDigitsIter(n:number):number{
 while(n>=10){
  let s=0;
  while(n){s+=n%10;n=Math.floor(n/10);}
  n=s;
 }
 return n;
}

package main

func addDigitsIter(n int) int {
	for n >= 10 {
		s := 0
		for n > 0 {
			s += n % 10
			n /= 10
		}
		n = s
	}
	return n
}

func main() {}

fn add_digits_iter(mut n: i32) -> i32 {
	while n >= 10 {
		let mut s = 0;
		while n > 0 {
			s += n % 10;
			n /= 10;
		}
		n = s;
	}
	n
}
fn main() {}