Question

Which function in the Arduino IDE is used to set any pin in output or input state?

1) digitalWrite
2) delay
3) pinMode
4) analogRead

Answer 1

The pinMode function is used in Arduino to set a pin as an input or output. This configuration is necessary before using other functions like digitalWrite or analogRead on the pins.

Step-by-step explanation:

The function in the Arduino IDE that is used to set any pin as an input or output is the pinMode function. This function is crucial for initializing pins so that they behave either as inputs or outputs. For example, to set pin 13 as an output, you would use the command pinMode(13, OUTPUT); in your setup function. If you wanted to set pin A0 as an input, you would use pinMode(A0, INPUT);. It's important to do this before using digitalWrite or analogRead with the corresponding pins since those functions assume that the pins have already been configured with pinMode.