1 inputs and then 1 outputs

 // Constants

const int potPin = A0;   // Analog input pin for potentiometer

const int ledPin = 9;    // Digital output pin for LED

// Variables

int sensorValue = 0;     // Variable to store the sensor reading

int outputValue = 0;     // Variable to store the output value

void setup() {

  pinMode(ledPin, OUTPUT);  // Set the LED pin as an output

}

void loop() {

  sensorValue = analogRead(potPin);    // Read the sensor value (0-1023)

  outputValue = map(sensorValue, 0, 1023, 0, 255);  // Map the sensor value to the LED brightness range (0-255)

  analogWrite(ledPin, outputValue);    // Set the LED brightness based on the mapped value

}