How to Create Nested Array in JSON?

i need to create a JSON which will have one array inside the other one, how to do it?

[[1, 2, 3], [4, 5, 6]]

Furthermore you can have nested Panels that data bind itemArray.

i need somet thing like as shown below
[[1,2,3[1,2,3]]]. please let me know how to do it?

You need a comma separating the 3 from the following array. Please read the JSON specification carefully, which is similar to but different from JavaScript syntax.