Explain pinMode(), digitalRead() and digitalWrite () functions of Arduino

Sure, I'd be happy to explain these functions in Arduino.

1. pinMode(): This function is used to configure a specific pin to behave either as an input or an output. Here is the syntax: pinMode(pin, mode). The 'pin' is the number of the Arduino pin you want to set. The 'mode' could be INPUT, OUTPUT, INPUT_PULLUP.

   Example: pinMode(13, OUTPUT); // sets the digital pin 13 as output

2. digitalRead(): This function is used to read the value from a specified digital pin, either HIGH or LOW. Here is the syntax: digitalRead(pin). The 'pin' is the number of the Arduino pin you want to read.

   Example: int buttonState = digitalRead(2); // reads the value from digital pin 2

3. digitalWrite(): This function is used to write a HIGH or a LOW value to a digital pin. If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the corresponding value: 5V (or 3.3V on some boards) for HIGH, 0V (ground) for LOW. Here is the syntax: digitalWrite(pin, value). The 'pin' is the number of the Arduino pin you want to write to. The 'value' could be HIGH or LOW.

   Example: digitalWrite(13, HIGH); // sets the digital pin 13 on