text: import { NotImplementedError } from '../extensions/index.js';
  
  /**
   * Given a number, replace this number with
   * the sum of its digits until we get to a one digit number.
   *
   * @param {Number} n
   * @return {Number}
   *
   * @example
   * For 100, the result should be 1 (1 + 0 + 0 = 1)
   * For 91, the result should be 1 (9 + 1 = 10, 1 + 0 = 1)
   *
   */
  export default function getSumOfDigits(n) {
   let arr  =  n.toString().split('');
   let res=0;
   console.log(arr);
  for (let i=0;i< arr.length; i++) {
  	res+=+arr[i];
  }
  console.lof(res);
  return res;
  }
  