public class Main {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        System.out.println("Enter your input.");
        int[] arr = {0,1,2,3,4,5,6,7,8,9};
        int target = in.nextInt();
        int ans = linearSearch(arr,target);
        System.out.println(ans);
    }
    // Search in array
    // Return 0 if item found if not return -1
    static int linearSearch(int[] arr,int target){
        if ( arr.length == 0){
            return -1;
        }
        int ans;
        for (int i = 0; i < arr.length; i++){
            int element = arr[i];
            if (element == target){
                return i;
            }
        }
        return -1;
    }