Getting Started with Arduino: Programming Arduino

The Arduino Integrated Development Environment (IDE) provides a source code editor and ability to upload your program to a usb attached board

Beyond the Arduino IDE, there are additional development tools and plugins for existing IDE platforms.

Arduino programming is done using C++ which is compiled using compiled for the platform using the Arduino IDE

Each Arduino program will have a minimum of void setup() and void loop() functions:

void setup() {
     // comments
     statements;
} 

void loop() { 
    statements;
}