Display a Toggle Variable on the Serial Monitor

Code

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/* Serial print the value of a variable that 'latches' on or off like the flashlight button */ int pressCount = 0; //An integer (whole number) variable to keep track of how many times the button is pressed void setup(){ Serial.begin(9600); //start the serial monitor to receive data pinMode(8,INPUT_PULLUP); //button } void loop(){ if(digitalRead(8)==LOW){ //if button 6 is pressed pressCount++; //++ is a way to add one to a variable. Now pressCount = its former value + 1 delay(250); //a delay allows you to release your finger from the button without counting multiple presses } Serial.println(pressCount); //'print' the value of pressCount if(pressCount > 1){ //if pressCount is greater than 1... pressCount = 0; //reset the count to 0 before the loop starts again } } // (c) 2021 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense
 

Walkthrough Video

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Video Notes for Code Lab Users:

  • Your button is on port 8 instead of port 6 as the video says.

Challenges

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Concepts

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Quiz

If you're having trouble, try to run an experimental program or look at the example code to help you find the answer.

1. Which syntax ends the entire 'void loop' function?




2. Which syntax ends a single code command?