coding error

I see you say that often but I've never had that problem. Auto Format works fine for me on Windows with every IDE version I can remember using no matter how mismatched the braces are. Maybe it's an OS-specific thing? I can't imagine why that would matter

Here's mannan12's code after I did an Auto Format on it:

int LEDS = 5;
int buttonA = 9;
int buttonB = 8;
byte leds = 0;
void setup()
{
  pinMode(LEDS, OUTPUT);
  pinMode(buttonA, INPUT_PULLUP);
  pinMode(buttonB, INPUT_PULLUP);
  Serial.begin(6900);
}
void loop()
{
  if (digitalRead(buttonA) == LOW)
  {
    digitalWrite(LEDS, HIGH);
  }
  if (digitalRead(buttonB) == LOW)
  {
    digitalWrite(LEDS, LOW);
  }
  else
    digitalWrite(LEDS, HIGH);
  delay(500);
  digitalWrite(LEDS, LOW);
  delay(500);
}
}

As you can see, the cause of the error is now much more obvious.