Is `[1,2,3]` valid json format?
I know:

    {
       name: 'Mike',
       age: 18
    }

or

    [{name: 'Mike'},{name: 'Jeff'}]

are valid jsons.

But I'm not sure if `[1,2,3]` is or not?
Is `[1,2,3]` valid json format?
===

I know:

    {
       name: 'Mike',
       age: 18
    }

or

    [{name: 'Mike'},{name: 'Jeff'}]

are valid jsons.

But I'm not sure if `[1,2,3]` is or not?