Limit switch with Nema 17 and A4988

Other Hardware Motors, Mechanics, Power and CNC
5

I think i don't understand about limit switch.
On limit switch ,

  • ON pin connect to digital 2
  • COM pin connect to GRN

and i try this code to test limit switch but i don't understand why it always show "1" on Serial Monitor although i press into limit switch. So this limit switch cannot change state? , anyone could show me why ?

const int lmswitch1 = 2;
void setup()
{
pinMode(lmswitch1 , INPUT);
}
void loop()
{
  if(digitalRead(lmswitch1==LOW)){
    Serial.println("1");
    delay(1000);
  }else{
    Serial.println("0");
    delay(1000);
  }
}