Explain GPIO pins on a raspberry pi pico w and give an example for each pin the purpose of usage.
GPIO (General Purpose Input/Output) pins are physical pins on the Raspberry Pi Pico board that can be used to connect and control various types of electronics and devices. The Raspberry Pi Pico has 26 GPIO pins, each of which can be used for different purposes depending on the user's requirements.

Here are some examples of how GPIO pins can be used:

Digital Output - A GPIO pin can be configured as a digital output and used to control an LED, for example.

Digital Input - A GPIO pin can be configured as a digital input and used to detect the state of a button or switch, for example.

Analog Input - A GPIO pin can be configured as an analog input and used to read the value of a sensor, such as a temperature sensor.

PWM (Pulse Width Modulation) Output - A GPIO pin can be configured as a PWM output and used to control the brightness of an LED, for example.

I2C Communication - A GPIO pin can be used as part of an I2C communication bus to communicate with various devices, such as sensors and displays.

SPI Communication - A GPIO pin can be used as part of an SPI communication bus to communicate with various devices, such as sensors and displays.

Note that not all GPIO pins on the Raspberry Pi Pico are available for all types of communication and usage, so it is important to check the specifications of the board and the particular pin in question before using it.