Leetcode 1768. Merge Strings Alternately

Problem

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...

Algorithm

Insert numbers alternately

Code

class Solution:
    def mergeAlternately(self, word1: str, word2: str) -> str:
        ans = ""
        L1, L2, P1, P2 = len(word1), len(word2), 0, 0
        while P1 < L1 or P2 < L2:
            if P1 < L1:
                ans += word1[P1]
                P1 += 1
            if P2 < L2:
                ans += word2[P2]
                P2 += 1
        return ans