Simple function returning 'undefined' value

Question

This is the function I am currently working on:

function getSmallestDivisor(xVal) {    

    if (xVal % 2 === 0) {
        return 2;
    } else if (xVal % 3          


        

Answer 1

I really can't resist to write this...because your question and all of the answers helped me so much. I had the exact same problem, I wrote recursive function and omitted return keyword. This page saved me hours of staring at the editor.

The task:

Digital root is the recursive sum of all the digits in a number. Given n, take the sum of the digits of n. If that value has more than one digit, continue reducing in this way until a single-digit number is produced.

function digital_root(n) {
  if(n < 10) {
    return n;
  }
   let toString =  String(n);
   let splitted = toString.split('');
  
   let summArrayItems = function (arr) {
    let total = 0;
      for(let i = 0; i < arr.length; i++) {
        total += Number(arr[i]);
      }
      return total;
    }
  let output = summArrayItems(splitted);
  
  if(output < 10) {
   return output;
  } else {
    return digital_root(output); // In this line I omitted return keyword, and received undefined
  }
}