digitalWrite() a digitalRead()

Code

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/* Use the reading from a button to determine the on/off status of an LED*/ void setup() { pinMode(2,OUTPUT); //LED light pinMode(8,INPUT_PULLUP); //Button } void loop() { digitalWrite(2,digitalRead(8)); //Use the digitalRead of the button to determine if the LED is on or off //Note:the digitalRead of a button is normally HIGH, and when it's pressed the digitalRead is LOW } // (c) 2021 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense
 

Walkthrough Video

Watch the video for a line-by-line explanation of how the example program works. Then you'll be ready to make some changes of your own!

Video Notes for Code Lab Users:

  • Your button is connected to port 8, not port 6 as the video says.

Challenges

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Concepts

These are the new code concepts covered in this example program. To become a great coder, read through these concepts to learn new vocabulary.

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?