1# <small>nlohmann::basic_json::</small>boolean_t 2 3```cpp 4using boolean_t = BooleanType; 5``` 6 7The type used to store JSON booleans. 8 9[RFC 8259](https://tools.ietf.org/html/rfc8259) implicitly describes a boolean as a type which differentiates the two 10literals `#!json true` and `#!json false`. 11 12To store objects in C++, a type is defined by the template parameter `BooleanType` which chooses the type to use. 13 14## Notes 15 16#### Default type 17 18With the default values for `BooleanType` (`#!cpp bool`), the default value for `boolean_t` is `#!cpp bool`. 19 20#### Storage 21 22Boolean values are stored directly inside a `basic_json` type. 23 24## Examples 25 26??? example 27 28 The following code shows that `boolean_t` is by default, a typedef to `#!cpp bool`. 29 30 ```cpp 31 --8<-- "examples/boolean_t.cpp" 32 ``` 33 34 Output: 35 36 ```json 37 --8<-- "examples/boolean_t.output" 38 ``` 39 40## Version history 41 42- Added in version 1.0.0. 43