Day 78: Check if Two Strings are Complementary | 100 Days of JavaScript Coding Challenge

🎯Welcome to Day 78 of the 100 Days of JavaScript Coding Challenge! 🚀
#CodeWithPoonam #100DaysOfCode

📥 Problem Statement:
Write a JavaScript function that checks if two strings are complementary (together containing all 26 English letters exactly once).

📊 Example:
Input: ("ABDCFGIJKLMNOPQUVWXYZ", "EHRST")
Output: Yes

Input: ("AABBCC", "DDEEFF")
Output: No

💡 Approach:
✅ Step 1: Combine both strings using concatenation (+).
✅ Step 2: Convert the combined string to lowercase using .toLowerCase().
✅ Step 3: Remove duplicate characters using the Set object.
✅ Step 4: Check if the set contains exactly 26 unique characters and all are alphabets.

📚 Key Takeaways:
✅ Use Set to eliminate duplicate characters.
✅ Combine .toLowerCase() and regular expressions for validation.
✅ Check for exactly 26 unique letters for the complementary condition.

📅 On Day 78, we learned how to check if two strings together form a complete set of English alphabets using JavaScript. This challenge improves your understanding of sets, string manipulation, and validation techniques.

🔥 Stay consistent and keep pushing forward!

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