Error in true false output in Array Problem

Question

Here's the question:

A Narcissistic Number is a positive number which is the sum of its own digits, each raised to the power of the number of digits in a given base. In this Kata, we will restrict ourselves to decimal (base 10).

For example, take 153 (3 digits), which is narcisstic:

1^3 + 5^3 + 3^3 = 1 + 125 + 27 = 153

Your code must return true or false (not 'true' and 'false') depending upon whether the given number is a Narcissistic number in base 10.

My Code is:

function narcissistic(value) {
  let vLen = value.length;
  let sum = 0;
  for (let i = 0; i < vLen; i++) {
    sum += Math.pow(value[i], vLen);
  }
  if (sum == value) {
    return true;
  } else {
    return false;
  }
}

But I'm getting errors. What should I do?

Answer 1

1. Numbers don't have .length, convert to string first
2. vLen[i], you cant treat a number as array, again, convert to string to use that syntax.
3. The return can be simplefied to return (sum === value);

function narcissistic(value) {
  let sVal = value.toString();
  let vLen = sVal.length;
  
  let sum = 0;
  for (let i = 0; i < vLen; i++) {
    sum += Math.pow(sVal[i], vLen);
  }
  
  return (sum === value);
}

console.log(narcissistic(153));
console.log(narcissistic(111));