Write a c program to perform binary search

 #include <stdio.h>


// Function to perform binary search

int binarySearch(int arr[], int left, int right, int target) {

    while (left <= right) {

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


        // Check if the target is present at mid

        if (arr[mid] == target) {

            return mid;

        }


        // If target is greater, ignore the left half

        if (arr[mid] < target) {

            left = mid + 1;

        }

        // If target is smaller, ignore the right half

        else {

            right = mid - 1;

        }

    }


    // Target is not present in the array

    return -1;

}


// Function to print the array

void printArray(int arr[], int size) {

    for (int i = 0; i < size; i++) {

        printf("%d ", arr[i]);

    }

    printf("\n");

}


int main() {

    int n, target;


    // Input the number of elements in the array

    printf("Enter the number of elements: ");

    scanf("%d", &n);


    int arr[n];


    // Input the elements of the array

    printf("Enter the elements (sorted in ascending order): ");

    for (int i = 0; i < n; i++) {

        scanf("%d", &arr[i]);

    }


    // Input the target value to search for

    printf("Enter the target value: ");

    scanf("%d", &target);


    // Perform binary search

    int result = binarySearch(arr, 0, n - 1, target);


    // Print the result

    if (result != -1) {

        printf("Element found at index: %d\n", result);

    } else {

        printf("Element not found in the array.\n");

    }


    return 0;

}


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