#define SENSOR_PIN A0

float voltage;
float temperature;

void setup() {
  Serial.begin(9600);
}

void loop() {

  int adc = analogRead(SENSOR_PIN);   // 0–1023

  voltage = adc * (5.0 / 100.0);    // Convert to volts

  temperature = voltage * 100.0;     // LM35: 10mV/°C

  Serial.print("ADC = ");
  Serial.print(adc);

  Serial.print("  Voltage = ");
  Serial.print(voltage);

  Serial.print(" V  Temp = ");
  Serial.print(temperature);

  Serial.println(" °C");

  delay(500);
}