public class basicarray {
public static void main(String[] args) {
    
    int [] arr = new int [4];
    arr[0]=10;
    arr[1]=20;
    arr[2]=30;
    arr[3]=40;
     System.out.println("First element "+arr[0]);
     System.out.println("Second element"+arr[1]);
     System.out.println("third element"+arr[2]);
     System.err.println("Fourth element"+arr[3]);
     System.out.println(arr.length);
}
    
}