This Arduino code performs the following actions: 1. **`void setup() {...

This Arduino code performs the following actions:

1. void setup() { Serial.begin(9600); }:

   • Inside the setup() function, the Serial.begin(9600); initializes the serial communication at a baud rate of 9600 bits per second. This allows the Arduino to communicate with a computer or other devices via the serial port.

2. void loop():

   • The loop() function runs continuously after the setup() function has executed.
   • Inside the loop, the code calls the fun1 function with an argument of 5 and stores the returned value into an integer variable n.
   • It then sends the value of n to the serial monitor using Serial.println(n);.

3. int fun1(int num):

   • This is a helper function that takes an integer parameter (num).
   • It adds 25 to num and returns the result.

4. Execution:

   • The code first calls fun1(5). This function adds 25 to 5, resulting in 30.
   • It then prints 30 to the serial monitor.
   • Since the loop() function runs endlessly, the value 30 will continuously be printed to the serial monitor.

Output: The serial monitor will display:

30
30
30
...

repeatedly.