arduino dht22

//library link https://www.arduinolibraries.info/libraries/simple-dht
#include <DHT.h>;
#define DHTPIN 2     
#define DHTTYPE DHT22   
DHT dht(DHTPIN, DHTTYPE); 
float hum;  
float temp; 
void setup()
{
  Serial.begin(9600);
  dht.begin();
  Serial.println("Welcome to Green Hackers");
}
void loop()
{    
    hum = dht.readHumidity();
    temp= dht.readTemperature();    
    Serial.print("Humidity: ");
    Serial.print(hum);
    Serial.print(" %, Temp: ");
    Serial.print(temp);
    Serial.println(" Celsius");
}