If arduino

Arduino what is #if

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

Source: forum.arduino.cc

If arduino

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

Source: arduino.cc

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

Source: arduino.cc

Arduino if else

if
   (condition1) {
  // do Thing A
}
else if
   (condition2) {
  // do Thing B
}
else {
  // do Thing C
}

If arduino

if

If arduino

pinMode(LED_BUILTIN, OUTPUT);

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