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JSON Array Literals

This is a JSON string:


'["Ford", "BMW", "Fiat"]'


Inside the JSON string there is a JSON array literal:


["Ford", "BMW", "Fiat"]


Arrays in JSON are almost the same as arrays in JavaScript.
In JSON, array values must be of type string, number, object, array, boolean
or null.
In JavaScript, array values can be all of the above, plus any other valid
JavaScript expression, including functions, dates, and undefined.

JavaScript Arrays
You can create a JavaScript array from a literal:

Example

myArray = ["Ford", "BMW", "Fiat"];

Try it Yourself »

You can create a JavaScript array by parsing a JSON string:

Example

myJSON = '["Ford", "BMW", "Fiat"]';
myArray = JSON.parse(myJSON);

Try it Yourself »


Accessing Array Values
You access array values by index:

Example

myArray[0];

Try it Yourself »


Arrays in Objects
Objects can contain arrays:

Example

{
"name":"John",
"age":30,
"cars":["Ford", "BMW", "Fiat"]
}


You access array values by index:

Example

myObj.cars[0];

Try it Yourself »








Looping Through an Array
You can access array values by using a for in loop:

Example

for (let i in myObj.cars) { 
x
+= myObj.cars;}
Try it Yourself »

Or you can use a for loop:

Example

for (let i
= 0; i < myObj.cars.length; i++) {  x
+= myObj.cars;}
Try it Yourself »













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Reference: https://www.w3schools.com/js/js_json_arrays.asp