What is the difference between these...

Question

a) int[] arr;
b) int[] arr=new int [x];
(where x can be any number)

can't we do this,
int[3] arr;. ?

Answer 1

With b) you can declare the size.

Answer 2

can't we just do this
int [x] arr;. ?

Answer 3

You can not do int[3] arr;
But you can do arr[3] = 2; (4th (0123=4) index of the array =2)

Answer 4

thanks