Final answer:
The Arduino UNO has 6 PWM pins that allow you to produce analog output signals.
Step-by-step explanation:
The Arduino UNO has a total of 6 PWM pins. These pins, which stand for Pulse Width Modulation, allow you to produce analog output signals. They are labeled with a tilde (~) symbol next to the corresponding digital pin number. Using PWM pins, you can control the intensity of LEDs, the speed of motors, and the brightness of displays, among other things.