how do I correctly show four as an array?

To correctly show the number four as an array, you can use square brackets [ ] to represent the array. In this case, since you are representing just one element – the number four – the array would contain only one element.

Here's an example of how to correctly show four as an array:

[4]

In this representation, the number four is enclosed within square brackets to indicate that it is an element of the array.