if else in arduino code example

Example 1: if arduino

if (x > 120) {
  digitalWrite(LEDpin, HIGH);
}

if (x > 120) {
  digitalWrite(LEDpin, HIGH);
}

if (x > 120) {
  digitalWrite(LEDpin, HIGH);
}

if (x > 120) {
  digitalWrite(LEDpin1, HIGH);
  digitalWrite(LEDpin2, HIGH);
}
// Alle Anweisungen sind korrekt

Example 2: arduino what is #if

The #if condition is evaluated only at compile time. The "if" is evaluated at run time.

Example 3: if arduino

if (condition) {
  //statement(s)
}