'else' without a previous 'if' error on arduino Ide

Using Arduino Programming Questions
1

I was trying to write code for a lightning effect for Halloween. I got an"'else' without a previous 'if'" error message even though "if" is above. My code is below:

int TriggerValue = 0;


void setup() {
  // put your setup code here, to run once:
pinMode(A0, INPUT);//Botton trigger
pinMode(1, OUTPUT);// light
pinMode(2, OUTPUT); //sfx
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
TriggerValue = digitalRead(A0);
if (TriggerValue != 0)
Serial.println("Triggered");
  digitalWrite(1, HIGH);
  delay(200);
  digitalWrite(1, LOW);
  digitalWrite(2, HIGH);
  delay(200);
  Serial.println("Gottom! You should have seen the look on your face!");
  digitalWrite(2, LOW);
else
(TriggerValue != 1);
    digitalWrite(1, LOW);
  
 
}

`
Thank you for helping!

2

You're missing { and } for the statements that depend on the if condition.

If you use tools->autoformat in the IDE, your code looks like

  if (TriggerValue != 0)
    Serial.println("Triggered");
  digitalWrite(1, HIGH);

indicating that only the Serial.println is depending on the condition and the digitalWrite is not.

Note the indentations after the autoformat was applied.

3

Always use braces

if (TriggerValue != 0)

{

}

else

{

}

4

The syntax you are looking for is probably

if( )
{
    ...
}
else
{
  ...
}

In your case the if statement ends with the first semicolon.

if (TriggerValue != 0)
Serial.println("Triggered");

All next lines are outside of this "if" so the "else" statement causes an error. Same problem is behind the "else".

5

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