public class LinearSearch {
  /** The method for finding a key in the list */
  public static int linearSearch(int[] list, int key) {
    for (int i = 0; i < list.length; i++) {
      if (key == list[i])
        return i;
    }
    return -1;
  }

  public static void main(String[] args) {
    int[] list = {4, 5, 1, 2, 9, -3};
    System.out.println(linearSearch(list, 2));
  }
}