analog pin name in variable

Projects Programming
1

Say just for example I wanted to read all of the analog pins as digital with a loop. For example:

int buttonPin[6] = {
  A0,A1,A2,A3,A4,A5};
void setup(){
Serial.begin(9600);
}

void loop(){
  for (int i=0;i<6;i++){
    Serial.println(digitalRead(buttonPin[i]));
  }
  delay(1000);
}

I went ahead and just tried this and it worked... Is this the proper way to do this?

Thanks.

2

The A0, A1, etc. "names" are just #define's into existence. The value depends on the board. For a 328 based board, A0 and 14 are equivalent. So, what you did was perfectly acceptable.

3

Ohhhhh I was really surprised that it worked. That makes perfect sense. Thanks.

4

You may want a second loop in setup to make sure they're inputs ( they are, by default, but if you wanted outputs, you could lose some hair chasing that down)