Valid Data Types
In JSON, values must be one of the following data types:
a string
a number
an object (JSON object)
an array
a boolean
null
JSON values cannot be one of the following data types:
JSON Strings
Strings in JSON must be written in double quotes.
Example(1)
{ "name":"John" }
JSON Numbers
Numbers in JSON must be an integer or a floating point.
Example(2){ "age":30 }
JSON Objects
Values in JSON can be objects.
Example(3)
{ "employee":{ "name":"John", "age":30, "city":"New York" } }
JSON Arrays
Values in JSON can be arrays.
Example(4)
{ "employees":[ "John", "Anna", "Peter" ] }
JSON Booleans
Values in JSON can be true/false.
Example(5)
{ "sale":true }
JSON null
Values in JSON can be null.
Example(6)
{ "middlename":null }
Complete Code For JSON Data Types Using JavaScript.
<!DOCTYPE html> <html> <head> <title>Which Are The JSON Data Types Used With JavaScript</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"> </head> <body> <div class="container"> <br> <div class="text-center"> <h1 id="color" style="color: tomato">Which Are The JSON Data Types Used With JavaScript</h1> </div> <br> <div class="well"> <h2 id="demo1"></h2> </div> <script> var myObj, i, x = ""; myObj = { "name":"John", "age":30, "cars":[ "Ford", "BMW", "Fiat" ] }; myObj.cars[1] = "Mercedes"; for (i in myObj.cars) { x += myObj.cars[i] + "<br>"; } document.getElementById("demo1").innerHTML = x; </script> </div> </body> </html>