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boolean

A boolean holds one of two values, true or false. (Each boolean variable occupies one byte of memory.)

Example

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 
		normallydelay(100);               // delay to debounce switch
		running = !running;               // toggle running variable
		digitalWrite(LEDpin, running)     // indicate via LED}
		}
		

See also

• constants
• boolean operators
• Variable Declaration

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