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api/basic_json/boolean_t/index.md

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+# nlohmann::basic_json::boolean_t
+
+```
+using boolean_t = BooleanType;
+```
+
+The type used to store JSON booleans.
+
+[RFC 8259](https://tools.ietf.org/html/rfc8259) implicitly describes a boolean as a type which differentiates the two literals `true` and `false`.
+
+To store boolean values in C++, a type is defined by the template parameter `BooleanType` which chooses the type to use.
+
+## Notes
+
+#### Default type
+
+With the default values for `BooleanType` (`bool`), the default value for `boolean_t` is `bool`.
+
+#### Storage
+
+Boolean values are stored directly inside a `basic_json` type.
+
+## Examples
+
+Example
+
+The following code shows that `boolean_t` is by default, a typedef to `bool`.
+
+```
+#include <iostream>
+#include <iomanip>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    std::cout << std::boolalpha << std::is_same<bool, json::boolean_t>::value << std::endl;
+}
+```
+
+Output:
+
+```
+true
+```
+
+## Version history
+
+- Added in version 1.0.0.