const float BETA = 3950;
  int sensor=0;
  float temperature;
  int read_from_sensor,index=0;
 float recorded_temp[100];



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

void loop() {
  if(index<100){
      read_from_sensor=analogRead(sensor);
      temperature= 1 / (log(1 / (1023. /  read_from_sensor - 1)) / BETA + 1.0 / 298.15) - 273.15;
      Serial.print("The current temperature is: ");
      Serial.print(temperature);
      Serial.println(" °C.");
      recorded_temp[index]=temperature;
      index++;
      Serial.print(index);
 }
 else{
      temperature=0.0;
      for(index=0;index<100;index++){
          temperature= temperature+recorded_temp[index];
       }
      temperature=temperature/100.0;
      Serial.print("the average temperature is ");
      Serial.println(temperature);
 }

}