Update content/arduino-cloud/01.guides/02.arduino-c/arduino-c.md

Author: karlsoderby

content/arduino-cloud/01.guides/02.arduino-c/arduino-c.md

@@ -7,6 +7,8 @@ author: 'Karl Söderby'
 
 The default option for programming your board to connect to the Arduino Cloud is by using the **C++ language**. The configuration and connection between your board and the Arduino Cloud is supported by the [ArduinoIoTCloud library](https://github.com/arduino-libraries/ArduinoIoTCloud) & [Arduino_ConnectionHandler](https://github.com/arduino-libraries/Arduino_ConnectionHandler) libraries.
 
+***When programming in C++, you can use the Arduino API (which is also known as the Arduino Language). To learn more about the Arduino API, check out the [language reference](https://www.arduino.cc/reference/en/).***
+
 Whenever you create a [Thing](/arduino-cloud/cloud-interface/things) in the Arduino Cloud, you automatically start generating a set of files that will handle the configurations, credentials & connection:
 - `<sketchname>.ino` - your main sketch file,
 - `thingProperties.h` - your main configuration file,