How to Find Unique Number in Array With Stream - Search Videos

💡 Java Interview / Coding Question: 👉 How do you find the missing number in an array using Java Stream API? Assume the array contains numbers from 1 to N with one number missing 👇 int n = arr.length 1; int expectedSum = IntStream.rangeClosed(1, n).sum(); int actualSum = Arrays.stream(arr).sum(); int missing = expectedSum - actualSum; 🎯 Explanation: - rangeClosed(1, n) → creates stream from 1 to N - expectedSum → sum of all numbers - actualSum → sum of given array - missing = expectedSum - ac

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