37.Python: Second Largest in Array (No Sorting, O(n))

In this video, we solve a classic Python interview question: "Find the second largest number in an array." We cover: - Edge cases (duplicates, short arrays) - Optimal O(n) approach without sorting - Clean, readable Python code Example: Input: [10, 20, 4, 45, 99] Output: 45 Perfect for: - Python interview prep - Beginners practicing arrays/lists - Competitive programming basics