Podcast
Questions and Answers
True or false: Any line in a program starting with // is meant to be read by the user only and is ignored by the Arduino?
True or false: Any line in a program starting with // is meant to be read by the user only and is ignored by the Arduino?
True (A)
True or false: The code between the curly brackets, {}, will run once when the program starts?
True or false: The code between the curly brackets, {}, will run once when the program starts?
True (A)
True or false: The open curly bracket, {, begins the setup code?
True or false: The open curly bracket, {, begins the setup code?
True (A)
True or false: The loop() statement will run once the Arduino is powered on and then repeat until it is powered off?
True or false: The loop() statement will run once the Arduino is powered on and then repeat until it is powered off?
True or false: The statement 'This tells the Arduino to set led' is incomplete in the given text?
True or false: The statement 'This tells the Arduino to set led' is incomplete in the given text?
True or false: The mention of 'led' in the sketch will refer to pin 13?
True or false: The mention of 'led' in the sketch will refer to pin 13?
True or false: The setup code will run once when the program starts?
True or false: The setup code will run once when the program starts?
True or false: The code 'This tells the Arduino that pin 13 is an output pin' indicates that pin 13 is an input pin?
True or false: The code 'This tells the Arduino that pin 13 is an output pin' indicates that pin 13 is an input pin?
True or false: The loop() statement will repeat until the Arduino is powered off?
True or false: The loop() statement will repeat until the Arduino is powered off?
True or false: The code 'This is a comment' is meant to be read by the Arduino?
True or false: The code 'This is a comment' is meant to be read by the Arduino?
Flashcards
What is a comment in Arduino code?
What is a comment in Arduino code?
Lines starting with '//' are comments for humans and ignored by the Arduino.
What happens to code within '{}'?
What happens to code within '{}'?
Code inside curly brackets '{}' runs once at the start of the program.
What does '{' signify in code?
What does '{' signify in code?
The opening curly bracket '{' marks the beginning of the setup code block.
How often does loop() run?
How often does loop() run?
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What does a complete statement tell the Arduino?
What does a complete statement tell the Arduino?
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What does the code generally indicate when it mentions the term 'led'?
What does the code generally indicate when it mentions the term 'led'?
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How many times does setup code run?
How many times does setup code run?
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What does pinMode(13, OUTPUT) do?
What does pinMode(13, OUTPUT) do?
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For how long does 'loop()' run?
For how long does 'loop()' run?
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Does Arduino read comments?
Does Arduino read comments?
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Study Notes
Arduino Sketch Basics
- Lines beginning with
//are comments for users, ignored by Arduino; useful for code documentation. - Multi-line comments can begin with
/*and end with*/, allowing explanation over several lines.
Variable Declaration
ledis defined as an identifier for pin 13; using this name throughout the code simplifies referencing the pin.
Setup Function
- Code within curly brackets
{}followingsetup()runs once upon program startup. - The command
pinMode(led, OUTPUT);designates pin 13 as an output pin, enabling power to an LED.
Loop Function
- The
loop()function initiates an infinite cycle of code execution after startup. - Code within its curly brackets
{}executes repeatedly until the Arduino is powered off, facilitating continuous tasks.
Pin Control
- The command
digitalWrite(led, HIGH);could be used to turn the LED on, whiledigitalWrite(led, LOW);turns it off.
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