Explain briefly the steps/ precautions necessary while changing the state of any port, from input to output or vice versa.

Note : A port (set of 8 physical pins) initialized as output, can be changed to act as input dynamically (or vice versa), but you need to exercise caution and follow a set procedure to transition from one mode to another.

This is for microcontrollers class, I'm not sure how this function works, we code in Arduino or C if the helps