1768_Merge_Strings_Alternately.java

/*
 * 1768. Merge Strings Alternately
 * Problem Link: https://leetcode.com/problems/merge-strings-alternately/description/
 * Difficulty:   Easy
 * 
 * Solution Created by: Muhammad Khuzaima Umair
 * LeetCode : https://leetcode.com/mkhuzaima/
 * Github   : https://github.com/mkhuzaima
 * LinkedIn : https://www.linkedin.com/in/mkhuzaima/
 */

class Solution {
    public String mergeAlternately(String word1, String word2) {
        StringBuilder sb = new StringBuilder();

        int i = 0;
        int j = 0;
        while (i < word1.length() && j < word2.length()) {
            sb.append(word1.charAt(i++));
            sb.append(word2.charAt(j++));
        }
        // append remaining of word1
        while (i < word1.length() ) {
            sb.append(word1.charAt(i++));
        }
        // append remaining of word2
        while (j < word2.length()) {
            sb.append(word2.charAt(j++));
        }

        return sb.toString();
    }
}