JSON DataTypes

In this tutorials, you will learn about the different data types supported by JSON values.

JSON Data Types

In JSON, data is represented as key/value pairs. The keys are strings(Text), and the values can be one of the following types:

1. String
2. Number
3. Object
4. Array
5. Boolean
6. Null

1. String

Strings in JSON must be written in double quotes.

Example

The sample below shows a JSON String.

{
"name": "Rohatash",
"Email": "test@gmail.com"
}

2. Number

Numbers in JSON must be an integer, floating and scientific notation. JSON numbers support the following formats:

• Integer -(Ex-1,2,4)
• Floating point -(Ex- 35000.45)
• Scientific notation -(Ex- 4.5e+6))

Example

The sample below shows a JSON Numbers.

{
   "age": 25,
   "salary": 35000.45,
   "taxablesalary": 4.5e+6
}

3. Object

JSON objects are used to represent a collection of key-value pairs. The keys are strings, and the values can be any of the valid JSON data types.

Example

The sample below shows a JSON Object.

{
     "FirstName" : "Rohatash",
     "Age" : 35,
     "Address" : "Mathura"
}

4. Array

An array is a collection or list of data as defined in other language. An array in JSON is a group of values that are separated by commas.

Example

The sample below shows a JSON Array.

{
     "FirstName" : "Rohatash",
     "Age" : "35",
     "Address" : "Mathura"
     "Qualification" : ["MCA", "BTech", "BCA"]
}

5. JSON Boolean

JSON supports two boolean values - true and false. It is important to note that the boolean values must be in lowercase and not enclosed in quotes.

Example

The sample below shows a JSON Boolean.

{
    "isActive":true,
    "isvalid":false
}

6. JSON Null

JSON supports a special value called null. It is used to represent a null value. Just like boolean values, null should also be in lowercase and not enclosed in quotes.

Example

The sample below shows a JSON Null.

{
    "name": null,
    "Qualification":null
}