Merge Words Algorithm

Leetcode
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I need to input the word2 into the some of word1.I need to insert one word from word1 and the next should be word2 and word1 ...

I want to write picking up one word from word1 and insert between word2.

class Solution:
    def mergeAlternately(self, word1: str, word2: str) -> str:
        for i in range(word1): 

I could not continue to write code from here.

class Solution:
    def mergeAlternately(self, word1: str, word2: str) -> str:
#Picking up one word from word2
        for i in range(word2): 
#Insertt word2 into word1.

Got this from AI.

class Solution:
    def mergeAlternately(self, word1: str, word2: str) -> str:
        result = ""
        i, j = 0, 0
        while i < len(word1) and j < len(word2):
            result += word1[i]
            result += word2[j]
            i += 1
            j += 1

        result += word1[i:]
        result += word2[j:]
        return result

Question; Can you use for loop to write that?

Answer from AI as follows.

class Solution:
    def mergeAlternately(self, word1: str, word2: str) -> str:
        result = ""

        min_length = min(len(word1), len(word2))
        for i in range(min_length):
            result += word1[i]
            result += word2[i]

        for i in range(min_length, len(word1)):
            result += word1[i]

        for i in range(min_length, len(word2)):  
            result += word2[i]

        return result

Using for loop makes longer.

Question; Could you explain the details of this code? How can I write this for programing beginner.
Answer from AI as follows.

The key steps are:
Initialize a result string to store the final merged string:
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result = ""
Initialize indexes i and j to keep track of current position in word1 and word2. Set both to 0 to start from beginning:
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i, j = 0, 0
Use a while loop to iterate through both words simultaneously. We want to merge characters until either word1 or word2 has reached its end:
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while i < len(word1) and j < len(word2):
In each iteration, append the next character from word1 to result:
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result += word1[i]
Then append the next character from word2:
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result += word2[j]
Increment both indexes to progress through the strings:
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i += 1
j += 1
After the while loop, one of the words may still have characters left. Append remainder of word1 using slicing:
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result += word1[i:]
Append remainder of word2:
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result += word2[j:]
Return the merged result string.
The key ideas are using indexes to keep track of current positions, mergingCharacter by character in a loop, and handling the remaining parts of longer string separately.
Let me know if any part is unclear! I'm happy to explain further for a beginner audience.

1 Declare the word "result" and have it recognized.
2 Add Initial number as zero.
3 Use while loop for this time to get words.
4 Add words one by one.