expected unqualified-id before numeric constant

Projects Programming
1

I have copied this code from the Arduino Projects Book. I have gone over it many times and it seems to be identical to the code in the book. Yet i get the error message with line 8 highlighted. Can anyone tell me what I have done wrong? Also, can the error message be translated into something I might understand. Thanks in advance.

1 int switchState = 0; 

2 void setup(){
3 pinMode(3,OUTPUT);
4 pinMode(4,OUTPUT);
5 pinMode(5,OUTPUT);
6 pinMode(2,INPUT);
7 }

8 void loop(){ 
9 switchState = digitalRead(2);
10 // this is a comment 

11 if (switchState == LOW) {
12 // the button is not pressed

13 digitalWrite(3,HIGH); // green on
14 digitalWrite(4,LOW);  // red off
15 digitalWrite(5,LOW); // red off
16 }

17 else {  // button is pressed
18 digitalWrite(3,LOW);
19 digitalWrite(4,LOW);
20 digitalWrite(5,HIGH);  tttt y y

21 delay(250); // wait 1/4 second
22 //toggle the LEDs
23 digitalWrite(4,HIGH);
24 digitalWrite(5,LOW);
25 delay(250); // wait 1/4 second
26  }
27  } // go back to the beginning of the loop
2

Does your code include the line numbers? That would be a bad thing.

3

Remove the line numbers.

20 digitalWrite(5,HIGH);  tttt y y

Remove the tttt y y

Use the IDE autoformat tool (ctrl-t or Tools, Auto Format).

int switchState = 0;

void setup()
{
   pinMode(3, OUTPUT);
   pinMode(4, OUTPUT);
   pinMode(5, OUTPUT);
   pinMode(2, INPUT);
}

void loop()
{
   switchState = digitalRead(2);
   // this is a comment

   if (switchState == LOW)
   {
      // the button is not pressed

      digitalWrite(3, HIGH); // green on
      digitalWrite(4, LOW); // red off
      digitalWrite(5, LOW); // red off
   }
   else   // button is pressed
   {
      digitalWrite(3, LOW);
      digitalWrite(4, LOW);
      digitalWrite(5, HIGH);

      delay(250); // wait 1/4 second
      //toggle the LEDs
      digitalWrite(4, HIGH);
      digitalWrite(5, LOW);
      delay(250); // wait 1/4 second
   }
} // go back to the beginning of the loop
4

Thank you. Don,t know how that tttt y y slipped in, it wasn't there when I tested things. But the line numbers, they were the problem. They are gone now and all is good.