Here’s something interesting about arrays: each element in the array has what’s called an *index*. The first element is at index `0`

, the next is at index `1`

, the following is at index `2`

, and so on. We can access elements of the array directly through these numbers using brackets, like so:

array = [5, 7, 9, 2, 0] array[2] # returns "9", since "9" # is at index 2

The diagram below shows how these indices work for our sample array, `[5, 7, 9, 2, 0]`

. The first element has index `0`

, the next has `1`

, the next has `2`

, and so on.

+---+---+---+---+---+ array | 5 | 7 | 9 | 2 | 0 | +---+---+---+---+---+ index 0 1 2 3 4

(This is a bit of an oversimplification, but it gets the idea across for now).

We can access the `i`

th element of an array called `array`

by putting the index in square brackets, like so: `array[i]`

. `array[0]`

gets the first element, `array[1]`

gets the second element, and so on. This is called *access by index*.

### Instructions

**1.**

Use square bracket notation to `print`

the third value of `demo_array`

to the console.

Remember that the third value is at index `2`

, not at index `3`

. We start counting indices from zero.

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