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  1. docs.arduino.cc › language-referenceLanguage Reference - Arduino Docs

    Language Reference. Arduino programming language can be divided in three main parts: functions, values (variables and constants), and structure. Functions. Variables. Structure. For controlling the Arduino board and performing computations.

  2. www.arduino.cc › en › GuideWhat is Arduino? | Arduino

    Arduino is an open-source electronics platform based on easy-to-use hardware and software. Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, turning on an LED, publishing something online.

  3. forum.arduino.cc › t › what-does-the-and-do-in-this-codeWhat does the "?" and ":" do in this Code - Arduino Forum

    Dec 18, 2013 · How do I know what variable gets assigned to in your syntax? What if you want to assign to a variable that doesn't show up anywhere else in the expression? i.e.

  4. forum.arduino.cc › t › ii++ - Programming Questions - Arduino Forum

    Jun 21, 2011 · One thing to note is that there is a difference between ++i and i++. The first on increments i BEFORE it is use in an expression. The second one increments i AFTER it is used. int i = 5; int a = ++i; // a = 6, i = 6. int b = i++; // b = 6, i = 7. int c = i; // c = 7. int d = --i; // d = 6, i = 6.

  5. forum.arduino.cc › t › symbol!! Symbol - Syntax & Programs - Arduino Forum

    Aug 19, 2010 · Hello, What does !! mean? as in digitalWrite(dataPin, !!(val &(1<<i))); else digitalWrite(dataPin, !!(val & (1<<(7-i)))); From a for loop (i=0, i<8, I++) This little instance of code is very confusing Thanks

  6. forum.arduino.cc › t › what-does-this-variablename-meanwhat does "this->variableName" mean - Arduino Forum

    Feb 3, 2014 · below is the Arduino Stepper.cpp I'm looking through, and just wondering what the "this->" is all about in front of a bunch of the variable names. Is it a naming convention or doing something I'm missing? Stepper::Stepp…

  7. forum.arduino.cc › t › what-is-the-difference-between-x-xWhat is the difference between "x++" & "++x"? - Arduino Forum

    Jan 7, 2011 · int x = 3; int y = 3; char array [10]; array [x++] = 'g'; The character 'g' is stored in array [3] and x will have the value 4 after the statement is executed. array [++y] = 'g'; The character 'g' is stored in array [4] and y will have the value 4 after the statement is executed. Statements like.

  8. forum.arduino.cc › t › why-put-in-front-of-a-variablewhy put "&" in front of a variable - Arduino Forum

    Jun 18, 2017 · I have been working with the nrf24l01, and one of the lines of code is: receiver.write (&text, sizeof (text)); Everything works correctly, I'm just curious as to why there is an "&" in front of "text".

  9. forum.arduino.cc › t › what-is-groundWhat is ground? - General Electronics - Arduino Forum

    Dec 30, 2013 · For example, to control an LED with an Arduino, you would connect an Arduino port pin to a resistor and LED, then connect the other end of the LED to circuit common (called "ground" in most cases). On an Arduino, this point is marked "GND" in the board's silkscreen.

  10. forum.arduino.cc › t › what-is-uint8_tWhat is " uint8_t" ? - Syntax & Programs - Arduino Forum

    Mar 16, 2009 · uint8_t is very useful for cross platform work – but a little cryptic for many Arduino users. I think the byte type is a more Arduino friendly way to express an unsigned 8 bit value. you can compile your program on a 64-bits Linux and a 32-bits Windows and you won't have to change the types