Why the answer to this questions is 2?

Question

int[] arr ={1,2,3,4};
int x= arr[arr[ ]];
System.out.print(x);

Answer 1

As we know array index starts from 0 so here it will start from 0

Int x = arr[arr[]] = arr[arr[0]];

value at location arr[0] is 1 so now

Int x= arr[arr[]] = arr[1];

Now value at location arr[1] is 2

Which is your output

Answer 2

Is the square bracket empty?

Answer 3

It's not even running, their is probably a 0 inside the bracket.

Answer 4

Then bracket should contain 2 inside.

Answer 5

Yes

Answer 6

The empty space of the bracket must be filled.

Answer 7

Yes, where did you find that question from?

Answer 8

In a Sololearn challenge.

Answer 9

Te original question is:
Fill in the blank to output 4.