int readPin=A0;
int ledPin=9;
int potentiometer;
float ledval;
void setup() {
  Serial.begin(9600);
  //Serial.print("hi");
  pinMode(readPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  potentiometer=analogRead(readPin);
  delay(500);
  ledval = (255.0/1023.0)* potentiometer;
  analogWrite(ledPin,ledval);
  //Serial.println(ledval);
  Serial.println(potentiometer);
}