void setup() { 
  Serial.begin(9600);		// initialize serial communications
} 

void loop() 
{ 
  int analogValue = analogRead(A0); // read the analog input 
  Serial.println(analogValue);		// print it

  // if your sensor's range is less than 0 to 1023, you'll need to
  // modify the map() function to use the values you discovered:
  int servoAngle = map(analogValue, 0, 1023, 0, 179);
}