Introduction to Dart
The client-optimised language behind Flutter.
What Dart is, why it matters, and how to navigate this track.
Dart is the client-optimised language behind Flutter — one codebase, every screen.
What is Dart?
Dart is a statically-typed language tuned for building user interfaces.
With Flutter, the same Dart code compiles to native iOS, Android, web, and desktop apps.
Your first example
Here is Dart saying hello. Read it top to bottom — every line earns its place.
void main() {
print("Hello, world!");
}Hello, world!
Why learn Dart?
- Powers Flutter for true cross-platform apps.
- Hot reload makes UI iteration instant.
- Familiar, approachable syntax for anyone from a C-family background.
Where it is used
- Flutter mobile apps
- Cross-platform UIs
- Web apps
- Desktop apps
How this track works
Every topic here has four views, switchable with the tabs at the top of each page:
- Learn — the clear, practical walkthrough you are reading now.
- Deep — every detail: edge cases, the full API, and what is really happening.
- Reference — a scannable, no-fluff lookup for when you already know the shape.
- Cheatsheet — the one-page summary, printable, for quick recall.
More like this
HTML Headings
h1 through h6 are the page’s table of contents. Use them for structure, never for size — that’s what CSS is for.
HTML Headings
h1–h6 are instances of HTMLHeadingElement. They take no special attributes — only the global set and ARIA — but there’s real depth in how they form the document outline and what you can do with them from JavaScript.
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