Pls tell me why the code below is not working

Question

public class Program {
public static void main(String[] args) {
int Arr[5];
System.out.println(Arr.length);
}
}

Answer 1

That's not the way to declare an array in Java. That's the c++ way I guess.

This would help :

int arr[] = new int[5];

Answer 2

array declaration is wrong

int arr []=new int [5]

Answer 3

you need to define the array's capacity, or the number of elements it will hold.