JSON and brackets

There is a web service that returns the following:

[{"1":444}]

What is the difference between this JSON structure, and the following one:

{"1":444}

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without the hard brackets.

What do the hard brackets represent?
Anthony LuciaAsked:
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Randy PooleCommented:
The square brackets specify an array.  where the { brackets specify an object.  So in the first response you could get back more then 1 object
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leakim971PluritechnicianCommented:
var json = [{"1":444}];
var j1 = json[0];
alert( j1[1] ); // alert 444

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VS :
var j1 = {"1":444};
alert( j1[1] ); // alert 444

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käµfm³d 👽Commented:
The JSON specification is a good place to go to understand all of the syntax you might encounter.
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