To require these fields, either remove the curly braces from
the constructor, or add required to the constructor.

The following screenshots show an example of the reusable
CustomCard class.

Project structure and resources

Where do I start writing the code?

Start with the lib/main.dart file.
It’s autogenerated when you create a Flutter app.

In Flutter, the entry point file is
{project_name}/lib/main.dart and execution
starts from the main function.

How are files structured in a Flutter app?

When you create a new Flutter project,
it builds the following directory structure.
You can customize it later, but this is where you start.

Where do I put my resources and assets and how do I use them?

A Flutter resource or asset is a file that is bundled and deployed
with your app and is accessible at runtime.
Flutter apps can include the following asset types: