void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  int temperature = 35;

  //conditions
  if (temperature == 20){
    Serial.println("OK"); //only excecuted if condition is met
  }
  if(temperature >= 30){
    Serial.println("SUPER OK");
  }
  if(temperature <= 30){
    Serial.println("NOT OK");
  }
  if((temperature >=20) && (temperature < 30)){
    Serial.println("MAYBE OK"); //only excecuted if both conditions are met
  }
  if((temperature >= 20) || (temperature < 10)){
    Serial.println("IS IT OKAY?"); //excecuted if either condition is met
  }
  if(temperature == 40){
    Serial.println("DEFINITELY OK");
  }
  else if (temperature == 35){
    Serial.println("COULD STILL BE OK"); //excecuted if the first condition is not met
  }
  else{
    Serial.println("WHAT HAPPENED?"); //excecuted if no conditions are met
  }
}
void loop() {
  // put your main code here, to run repeatedly:

}