public static void main(String[] args) {

Scanner in = new Scanner(System.in);

int [] arr = {-12, 45, -7, 89, -23, 56, -91, 34, -18, 67, 2, -78, 39, -50, 6, 99, -27, 41, -73, 15};

System.out.println(Arrays.toString(arr));

System.out.print("Enter the target element : ");

int target = in.nextInt();

System.out.print("Enter the range to search within (st end) : ");

int index1 = in.nextInt();

int index2 = in.nextInt();

System.out.println(find(arr , target , index1 , index2));

}

static String find(int[] arr , int target , int i1 , int i2){

if(i1<0 || i2>=arr.length || i1>i2)

return "invalid range!";

for(int i = i1 ; i < i2 ; i++ ){

if(arr[i] == target)

return "Found at index :" + i;

}

return "Not found!";

}

}