#include <LiquidCrystal_I2C.h>
  LiquidCrystal_I2C lcd(0x27,16,2);

  #include <DHT.h>
  DHT sensor(4, DHT22);

  int Pbutton1;
  int Pbutton2;

void setup() {
  pinMode(Pbutton1, INPUT);
  pinMode(Pbutton2, INPUT);
  lcd.begin(16,2);
  lcd.backlight();
  sensor.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
  A:
  Pbutton1=digitalRead(2);
  if(Pbutton1==0){
    goto B;
  }

  Pbutton2 = digitalRead(3);
  if(Pbutton2==0){
    lcd.clear();
  }
  goto A;

  B:
  sensor.read(4);
  float temp = sensor.readTemperature();
  
  lcd.setCursor(0,0); 
    lcd.print("Temperature: ");
  lcd.setCursor(0,1);
    lcd.print(temp); 
    lcd.println(" Celsius");

  Pbutton2 = digitalRead(3);
  if(Pbutton2==0){
    lcd.clear();
    goto A; 
  }

  
  goto B;
}