BinarySearch.java

public class BinarySearch {
    public static void main(String[] args) {
        int[] arr = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20};
        int target = 12;

        int result = binarySearch(arr, target);

        if (result == -1) {
            System.out.println("Element not found in the array.");
        } else {
            System.out.println("Element found at index " + result);
        }
    }

    // Function to perform binary search on a sorted array
    public static int binarySearch(int[] arr, int target) {
        int left = 0;
        int right = arr.length - 1;

        while (left <= right) {
            int mid = left + (right - left) / 2;

            if (arr[mid] == target) {
                return mid; // Element found, return its index
            }

            if (arr[mid] < target) {
                left = mid + 1; // Search the right half
            } else {
                right = mid - 1; // Search the left half
            }
        }

        return -1; // Element not found in the array
    }
}