deploy: 40a62947d3

api/basic_json/is_null.md

@@ -25,13 +25,52 @@ Constant.
     The following code exemplifies `is_null()` for all JSON types.
     
     ```cpp
-    --8<-- "examples/is_null.cpp"
+    #include <iostream>
+    #include <nlohmann/json.hpp>
+    
+    using json = nlohmann::json;
+    
+    int main()
+    {
+        // create JSON values
+        json j_null;
+        json j_boolean = true;
+        json j_number_integer = 17;
+        json j_number_unsigned_integer = 12345678987654321u;
+        json j_number_float = 23.42;
+        json j_object = {{"one", 1}, {"two", 2}};
+        json j_array = {1, 2, 4, 8, 16};
+        json j_string = "Hello, world";
+        json j_binary = json::binary({1, 2, 3});
+    
+        // call is_null()
+        std::cout << std::boolalpha;
+        std::cout << j_null.is_null() << '\n';
+        std::cout << j_boolean.is_null() << '\n';
+        std::cout << j_number_integer.is_null() << '\n';
+        std::cout << j_number_unsigned_integer.is_null() << '\n';
+        std::cout << j_number_float.is_null() << '\n';
+        std::cout << j_object.is_null() << '\n';
+        std::cout << j_array.is_null() << '\n';
+        std::cout << j_string.is_null() << '\n';
+        std::cout << j_binary.is_null() << '\n';
+    }
+    
     ```
     
     Output:
     
     ```json
-    --8<-- "examples/is_null.output"
+    true
+    false
+    false
+    false
+    false
+    false
+    false
+    false
+    false
+    
     ```
 
 ## See also