Fizz Buzz Simple Challenge Javascript

FizzBuzz.js

/**
 * Returns the Fizz Buzz value for a given number.
 *
 * @param {number} num - The input number.
 * @returns {string|number} The Fizz Buzz value:
 *   - "Fizz" if the number is divisible by 3.
 *   - "Buzz" if the number is divisible by 5.
 *   - "FizzBuzz" if the number is divisible by both 3 and 5.
 *   - The input number if none of the above conditions are met.
 */
function fizzBuzz(n) {
	// Added number validation to ensure a number was passed in
  if (typeof n !== "number") {
    throw new Error("Input must be a valid number.");
  }
  
  let result = [];
  for (i = 1; i <= n; i++) {
    if (i % 3 === 0 && i % 5 === 0) {
      result.push('FizzBuzz');
    } else if (i % 3 === 0) {
      result.push('Fizz');
    } else if (i % 5 === 0) {
      result.push('Buzz');
    } else {
      result.push(i);
    }
  }

  return result.join();
}