How to read pot values to arduino serial monitor only when you move the pot?

Question

This code is for reading potentiometer and print the value to arduino serial monitor but you get values even if you dont move the pot.

What do I have to change in the code to get values only when you move the potentiometer?

 void setup() {
 // initialize serial communication at 9600 bits per second:
 Serial.begin(9600);
 }

 // the loop routine runs over and over again forever:
 void loop() {
 // read the input on analog pin 0:
 int sensorValue = analogRead(A0);
 // print out the value you read:
 Serial.println(sensorValue);
 delay(1);        // delay in between reads for stability
 }

Answer 1

int oldValue = 0; 
void setup() {
 // initialize serial communication at 9600 bits per second:
 Serial.begin(9600);
 }

 // the loop routine runs over and over again forever:
 void loop() {
 // read the input on analog pin 0:
 int sensorValue = analogRead(A0);
 // print out the value you read:

if (sensorValue  != oldValue){
 Serial.println(sensorValue);
 oldValue = sensorValue;
}
 delay(1);        // delay in between reads for stability
 }

You need to use a variable to hold the old value and compare it to the new reading. If they differ print the new value and update the old value