json/docs/mkdocs/docs/api/basic_json/is_array.md

nlohmann::basic_json::is_array

constexpr bool is_array() const noexcept;

This function returns #!cpp true if and only if the JSON value is an array.

Return value

#!cpp true if type is an array, #!cpp false otherwise.

Exception safety

No-throw guarantee: this member function never throws exceptions.

Complexity

Constant.

Examples

??? example

The following code exemplifies `is_array()` for all JSON types.

```cpp
--8<-- "examples/is_array.cpp"
```

Output:

```json
--8<-- "examples/is_array.output"
```

Version history

• Added in version 1.0.0.