Example: Let’s say your array is {5, 2, 9, 1, 5, 6}. Write down: 5, 2, 9, 1, 5, 6. Remove duplicates: 5, 2, 9, 1, 6 (unique values). Sort in descending order: 9, 6, 5, 2, 1. Identify the second highest: The second highest number is 6.