Potentiometer Servo Code

#include <Servo.h>
Servo servo;
const int servoOut = 9;
const int potIn = A0;
void setup() {
  pinMode(servoOut, OUTPUT);
  pinMode(potIn, INPUT);
  servo.attach(9);
  Serial.begin(9600);
}

void loop() {
  int data = analogRead(potIn);
  data = map(data, 0, 1023, 0, 180);
  Serial.println(data);
  servo.write(data);
}