const int ledPin=10;
const int potPin=A0;
int value=0;

void setup() {
  Serial.begin(9600);
  pinMode(ledPin,OUTPUT);
  pinMode(potPin, INPUT);
}

void loop() {
  value=analogRead(potPin);
  value = map(value, 0, 1023, 0, 255);
  analogWrite(ledPin,value);
  Serial.print("PWM Value : ");
  Serial.println(value);
  delay(100);
}