LetвЂ™s look at another program. In this tutorial, though, I will just be going over the while statement. These are the вЂњWhileвЂќ and вЂњIfвЂќ statements. You need these lines to have the sensors work.In order to program sensors, we need to learn two simple but very helpful statements. Click OK and the text should be at the top of your code.

Now here is a more complex program using ultrasonic and touch sensors. I donвЂ™t use the sound sensor very often because I think it does not have much value in programs. For the ultrasonic sensor, the value is distance, and for color, the value is the reflected light. For the touch sensor, there are only two values, 0 (not pressed) or 1 (pressed). For the first line here, you put the name of the sensor, in this case вЂњtouchвЂќ in the parenthesis, use an equality (=) or inequality (!=) sign, and a set a value.

Task main()So, while the touch sensor is pressed, it will run the function вЂњoneвЂќ, and when there is an object in the robotвЂ™s way, it will run the function вЂњtwoвЂќ.That is all for now. When everything is clear, the robot will simply go forward.Now, how can we incorporate functions into this? LetвЂ™s take a look. Also, while there is an object in the way, it will stop and play an annoying beeping sound until you move the object. This program codes the robot to, while the touch sensor is pressed, back up and turn. This is an infinite loop so the program will run forever (or until you stop it.) I use that to loop the program.

Robotc Ultrasonic Sensor