compiling program

Using Arduino Programming Questions
1

This program continues to produce a "expected unqualified id before numeric contant for line 17.

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
}
10 // this is a comment

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

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

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

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

2

Because you have posted the line numbers for your code it is impossible (without a lot of editing) to study your code in a text editor. The text editor will number the lines without interfering with the program code.

When posting code please use the code button </>
codeButton.png

so your code looks like this

See How to use the Forum

...R

3

Please post the code as described in the how to use this forum-please read stickies. Please remove the line numbers and auto format (ctrl-t or Tools, Auto Format) before posting so that we can load the code into the IDE for examination.

4

You closed loop() as soon as you do digitalRead(), the rest of the code is left out.

5

LOW is spelled "LOW", not "low"

Please stop creating new topics for the same problem.

Duplicates deleted.