read 2 DHT22 sensors

Using Arduino Sensors
6

could u please explain me what are (t,2) and (h,1 ) do....I mean i know the 't' is temperatue and 'h' is humidity but what about the numbers 2 and 1 ? what are they doing

void doPrintTH(float t, float h)
{
  Serial.print(t,2);
  Serial.print(" Celsius      ");
  Serial.print(h,1 );
  Serial.println("% Humidity");
}

thankyou