Binary Search
public class BinarySearch {
// Binary search function to find the target element in a sorted array.
// Returns the index of the element if found, or -1 if not found.
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; // Target found, return its index
} else if (arr[mid] < target) {
left = mid + 1; // Target is in the right half
} else {
right = mid - 1; // Target is in the left half
}
}
return -1; // Target not found in the array
}
public static void main(String[] args) {
int[] arr = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int target = 5;
int result = binarySearch(arr, target);
if (result != -1) {
System.out.println("Element " + target + " found at index " + result);
} else {
System.out.println("Element " + target + " not found in the array.");
}
}
}