The following table lists the data types supported by JSON.
| Type | Description |
|---|---|
| Number | double-precision, floating-point format in JavaScript.
Octal and hexadecimal formats are not used.
No NaN or Infinity.
Example, 1,9, 0,-4. Fractions like .3, .9 Exponent like e, e+, e-,E, E+, E- var json-object-name = { string : number_value}
|
| String | double-quoted Unicode with backslash escaping. Escape sequence: \b \f \n \r \t \u var json-object-name = { string : "string value"}
|
| Boolean | true or false var json-object-name = { name: true/false,}
|
| Array | An ordered sequence of values. Array elements are enclosed square brackets [element,element,element, ].
|
| Value | Can be a string, a number, true or false, null etc |
| Object | An unordered collection of key:value pairs. Object are enclosed in curly braces starts with '{' and ends with '}'. key:value pairs are separated by ,The keys must be strings and should be different from each other. { string : value, string1 : value1,.......}
|
| Whitespace | can be used between any pair of tokens |
| null | empty |
Example showing Number Datatype, value should not be quoted:
var obj = {grade: 97}
Example of String data type.
var obj = {name: 'abc'}
var obj = {name: 'Jack', grade: 97, pass: true}
The following JSON data has an array of three books.
{
"books": [
{ "language":"Java" , "edition":"second" },
{ "language":"C++" , "edition":"fifth" },
{ "language":"C" , "edition":"third" }
]
}
Example showing Object:
{
"id": "1",
"language": "Java",
"page": 500,
}