void setup()
{
  Serial.begin(9600);
  pinMode(8, OUTPUT);
}

void loop()
{
  int volt=analogRead(A0 );
  float tempe=volt*(5/1024.0);
  float temp=tempe*100;
  Serial.print("temperature");
  Serial.print(temp);
  Serial.println("c");
  if(temp>=100){
  digitalWrite(8, HIGH);
  delay(500);
  digitalWrite(8,LOW);
  delay(500);

  }

}