Description
The setup() function is called when a sketch starts. Use it to initialize variables, pin modes, start using libraries, etc. The setup() function will only run once, after each powerup or reset of the Arduino board.
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setup()
[Sketch]Example Code
int buttonPin = 3;
void setup() {
Serial.begin(9600);
pinMode(buttonPin, INPUT);
}
void loop() {
// ...
}See also
-
LANGUAGE loop()
