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api/basic_json/is_binary.md

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+# <small>nlohmann::basic_json::</small>is_binary
+
+```cpp
+constexpr bool is_binary() const noexcept;
+```
+
+This function returns `#!cpp true` if and only if the JSON value is a binary array.
+    
+## Return value
+
+`#!cpp true` if type is binary, `#!cpp false` otherwise.
+
+## Exception safety
+
+No-throw guarantee: this member function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Examples
+
+??? example
+
+    The following code exemplifies `is_binary()` for all JSON types.
+    
+    ```cpp
+    --8<-- "examples/is_binary.cpp"
+    ```
+    
+    Output:
+    
+    ```json
+    --8<-- "examples/is_binary.output"
+    ```
+
+## Version history
+
+- Added in version 3.8.0.