if else statement in arduino programming code example

Example 1: arduino what is #if

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

Example 2: arduino if else

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

Example 3: if arduino

pinMode(LED_BUILTIN, OUTPUT);