Beginner Exercism • javascript

Armstrong Numbers

Challenge Overview

An [Armstrong number][armstrong-number] is a number that is the sum of its own digits each raised to the power of the number of digits.

Source: Exercism javascript/armstrong-numbers

💡 View Solution

export const isArmstrongNumber = (n) => {
  const digits = [...String(n)];
  const len = digits.length;
  return BigInt(n) === digits.reduce((sum, d) => sum + BigInt(d) ** BigInt(len), BigInt(0));
};