Flutter for Beginners

Hello world

The following code is a basic Dart script, so let's take a look:

main() { // the entrypoint of an Dart app    var a = 'world'; // declaring and initializing variable    print('hello $a'); // call function to print to display output}

This code contains some basic language features that need highlighting:

• Every Dart app must have an entry point top-level function (you can refer to Chapter 2, Intermediate Dart Programming, for more information on top-level functions), that is, the main() function.

If you choose to run this code locally on your preconfigured machine with Dart SDK, save the contents to a Dart file, and then run it with a Dart tool in a Terminal, for example, dart hello_world.dart. This will execute the main function of ...