LeetCode 258 Explained Simply | Add Digits in C++

🚀 In this video, we solve LeetCode Problem 258 – Add Digits using a simple and beginner-friendly C++ approach. This problem is great for practicing loops, digit extraction, and basic number manipulation techniques used in DSA.

🔍 Problem Statement:
Given an integer num, repeatedly add all its digits until the result becomes a single-digit number, then return that digit.

📌 Example:
Input: 38
Step 1 → 3 + 8 = 11
Step 2 → 1 + 1 = 2
Output: 2

💡 Approach Used in This Video:

Extract digits using % 10
Remove digits using / 10
Keep calculating the digit sum
Repeat until the number becomes a single digit

⚡ Concepts Covered:

While loops
Digit extraction
Number manipulation
Nested loops in C++
Beginner DSA logic building

⏱️ Time Complexity: O(log n)
⏱️ Space Complexity: O(1)

💻 The solution is explained step by step with clean and easy-to-understand C++ code, making it perfect for beginners and students preparing for coding interviews or improving problem-solving skills.

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#LeetCode #LeetCode258 #AddDigits #CPP #DSA #Coding #Programming #Algorithms

Видео LeetCode 258 Explained Simply | Add Digits in C++ канала ansh patel