Page 265 - 최강 아두이노 퍼스트 참고서

// constants won't change. They're used here to // set pin numbers:
const int buttonPin = 2; // the number of the pushbutton pin const int
ledPin = 13; // the number of the LED pin

// variables will change:
int buttonState = 0; // variable for reading the pushbutton status

void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}

void loop(){
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);

// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) { //
turn LED on:
digitalWrite(ledPin, HIGH);
} else
{
// turn LED off: digitalWrite(ledPin,
LOW);
}
}

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