What is a JSON Array?
A JSON array is an ordered list of values. Data is enclosed in [],
and elements are separated by commas ,.
Elements in an array can be any JSON data type.
{
"fruits": ["apple", "banana", "orange"],
"numbers": [1, 2, 3, 4, 5],
"mixed": [1, "two", true, null, {"key": "value"}]
}Array Features
1 Ordered Collection
Elements maintain insertion order and can be accessed via index (0-based).
2 Any Data Type
Array elements can be strings, numbers, booleans, objects, arrays, or any valid JSON type.
3 Nestable
Arrays can contain other arrays or objects, forming complex data structures.
4 Can be Empty
Empty arrays [] are valid JSON.
Common Array Operations
Array of Objects
Arrays of objects are one of the most common data structures, often used to represent lists:
{
"users": [
{
"id": 1,
"name": "John Doe",
"age": 28
},
{
"id": 2,
"name": "Jane Smith",
"age": 32
},
{
"id": 3,
"name": "Bob Johnson",
"age": 25
}
]
}💡 Tip: In practice, API responses are often in the format of an array of objects.