Confusion regarding digital pins on arduino uno? are they output or input?

[abtj_90]

As shown in attached snap, pins 1-13 have written 'digital'on their left side

Are they digital output pins or digital input pins?

[UKHeliBob]

@abtj_90

Are they digital output pins or digital input pins?

Either, depending on the pinMode() that you use

[J-M-L]

see pinMode() - Arduino Reference and https://docs.arduino.cc/learn/microcontrollers/digital-pins

[essejcds]

Beyond that you can also use the analog pins as digital pins also.