Boolean

布尔 一个布尔变量拥有两个值，true或false。（每个布尔变量占用一个字节的内存） 示例 int LEDpin = 5; // LED on pin 5 int switchPin = 13; // momentary switch on 13, other side connected to ground boolean running = false; void setup() { pinMode(LEDpin, OUTPUT); pinMode(switchPin, INPUT); digitalWrite(switchPin, HIGH); // turn on pullup resistor } void loop() { if (digitalRead(switchPin) == LOW) { // switch is pressed - pullup keeps pin high normally delay(100); // delay to debounce switch running = !running; // toggle running variable digitalWrite(LEDpin, running); // indicate via LED } } 扩展阅读 - 常量

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