void loop() {
   // read the sensor:
   int sensorValue = analogRead(A0);
   // print the results:
   Serial.print(sensorValue);
   Serial.print(",");

   // read the sensor:
   sensorValue = analogRead(A1);
   // print the results:
   Serial.print(sensorValue);
   Serial.print(",");

   // read the sensor:
   sensorValue = digitalRead(switchPin);
   // print the last reading with a println() so that
   // each set of three readings prints on a line by itself:
   Serial.println(sensorValue);
 }