const int LEDPIN = 22; 
const int PushButton = 15;

void setup()
{
  pinMode(LEDPIN, OUTPUT);
  pinMode(PushButton, INPUT);
}

void loop(){
  int Push_button_state = digitalRead(PushButton);
  if ( Push_button_state == HIGH )
  { 
    digitalWrite(LEDPIN, HIGH); 
  }
  else 
  {
    digitalWrite(LEDPIN, LOW); 
  }
}