Final answer:
The UNO board has 14 digital pins labeled from D0 to D13.
Step-by-step explanation:
The UNO board is a microcontroller board based on the ATmega328P. It has a total of 14 digital pins.
These pins can be used for digital input or output.
They are labeled from 0 to 13 on the board, and are usually referred to as D0 to D13.