#define ledPin 9 // LED connected to digital pin 9
#define pot A0 //potentiometer connected to analog input A0

int fadeValue; //save the analog value

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

void loop() {

fadeValue=analogRead(pot); //return a value 0-1023

fadeValue=map(fadeValue,0,1023,0,255); //return a value 0-255

analogWrite(ledPin, fadeValue); //write the analog value

Serial.println(fadeValue); //show the value on serial monitor

}