Arduino Servo Motor Code 2

#include <Servo.h>

Servo servoknob;

int potpin = 0;
int val;

void setup() 
{
  servoknob.attach(11);
}

void loop()
{
  val = analogRead(potpin);
  val = map(val, 0, 1023, 0, 180);
  servoknob.write(val);
  delay(15);
}