#1768 - Merge Strings Alternately

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Problem Description

You are given two strings word1 and word2. Merge the strings by adding letters in alternating order, starting with word1. If a string is longer than the other, append the additional letters onto the end of the merged string.

Return the merged string.

Solution

/**
 * @param {string} word1
 * @param {string} word2
 * @return {string}
 */
var mergeAlternately = function(word1, word2) {
  let result = '';
  for (let i = 0; i < Math.max(word1.length, word2.length); i++) {
    if (i < word1.length) result += word1[i];
    if (i < word2.length) result += word2[i];
  }
  return result;
};