basic_dart_program.dart

// BEGIN(basic_dart_program)
// Define a function.
printNumber(num aNumber) {
  print('The number is $aNumber.'); // Print to the console.
}

// This is where the app starts executing.
main() {
  var number = 42;           // Declare and initialize a variable.
  printNumber(number);       // Call a function.
}
// END(basic_dart_program)